Switching device

Abstract

The utility model relates to the technical field of switching devices, in particular to an improvement of an operating mechanism of a switching device, the switching device comprises a bend operating mechanism and a moving contact group connected to the bend operating mechanism, the bend operating mechanism comprises a first rotating shaft and a second rotating shaft which have an included angle, and the tail end of the first rotating shaft is provided with an operating handle. The operating handle is used for driving the first rotating shaft to rotate, the first rotating shaft and the second rotating shaft are connected through a corner transmission structure, so that rotation of the first rotating shaft is transmitted to the second rotating shaft through the corner transmission structure, and the second rotating shaft is connected with the moving contact set to drive the moving contact set to rotate. According to the utility model, the angle bending operation mechanism is arranged, so that the rotating shaft of the operation handle and the rotating shaft of the moving contact group form an included angle, the operation handle can be arranged on the axial side edge of the moving contact group, the layout of a switching device is optimized, and compared with the existing in-line disconnecting switch, the height of the switching device such as a circuit breaker or a disconnecting switch can be reduced; and the requirement of miniaturization development is met.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, and specifically to an improvement of the operating mechanism of a switchgear. Background Technology

[0002] Switchgear refers to the switching devices defined in GB / T 5226.1-2019 / IEC 60204-1:2016, namely, electrical appliances used to connect or disconnect one or more circuit currents. Specific component forms can include circuit breakers, relays, contactors, disconnectors, etc. Circuit breakers and disconnectors typically have operating handles for manual operation of their contact groups. Taking disconnectors as an example: a traditional rotary disconnector consists of an operating handle, a drive assembly, and a contact system. The operating mechanism is driven by manually rotating the operating handle. The arrangement of the operating handle, drive assembly, and contact group is in a linear fashion, meaning the operating handle, drive assembly, and contact system are arranged along the axial direction of the moving contact's rotation axis. This results in a relatively large height of the disconnector in the direction of the moving contact's rotation axis. Disconnectors with shunt trip function place the shunt trip system between the operating handle and the contact system, further increasing the height of the disconnector. Therefore, the traditional linear structure of circuit breakers or disconnectors is difficult to adapt to the development needs of intelligent and miniaturized new energy electrical systems. Summary of the Invention

[0003] The purpose of this utility model is to provide a switchgear that uses a bend-angle operating mechanism to form a bend-angle layout between the operating handle and the rotating shaft of the moving contact group, thereby reducing the height of switchgear such as circuit breakers or disconnect switches, in order to solve the problem that the traditional inline disconnect switches or circuit breakers have an unreasonable structural layout and are difficult to adapt to the needs of miniaturization.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a switch electrical appliance, including a bend-angle operating mechanism and a moving contact group connected to the bend-angle operating mechanism. The bend-angle operating mechanism includes a first rotating shaft and a second rotating shaft with an included angle. An operating handle is provided at the end of the first rotating shaft. The operating handle is used to drive the first rotating shaft to rotate. The first rotating shaft and the second rotating shaft are connected through a bend-angle transmission structure, thereby transmitting the rotation of the first rotating shaft to the second rotating shaft through the bend-angle transmission structure. The second rotating shaft is connected to the moving contact group to drive the moving contact group to rotate.

[0005] In one embodiment, the bend-angle transmission structure is a toothed transmission structure.

[0006] In one embodiment, the included angle between the first shaft and the second shaft is 90°.

[0007] In one embodiment, the bend-angle transmission structure is a bevel gear structure, including a first bevel gear and a second bevel gear. The first bevel gear is synchronously rotatably connected to and coaxial with the first rotating shaft, and the second bevel gear is synchronously rotatably connected to and coaxial with the second rotating shaft.

[0008] In one embodiment, the corner operating mechanism includes a housing assembly, the corner transmission structure is disposed within the housing assembly, the first rotating shaft passes through the housing assembly and its end extends to the outside of the housing assembly and connects to the operating handle, the outer circumferential surface of the first rotating shaft is provided with two protrusions spaced apart along its axial direction, the housing assembly is provided with a mounting part, the two protrusions are respectively disposed on both sides of the mounting part, and the protrusions and the mounting part form an abutting fit to fix the first rotating shaft axially to the housing assembly.

[0009] In one embodiment, the housing assembly includes a base and a top cover. The mounting portion is disposed on the base and has a first mounting groove with an opening facing the top cover. The base has a second mounting groove with the same opening direction as the first mounting groove. The top cover has a third mounting groove. The first mounting groove and the second mounting groove are distributed along the axial direction of the first rotating shaft. The first rotating shaft is directly or indirectly mounted in the first mounting groove and the second mounting groove. The base and the top cover cooperate such that the second mounting groove and the third mounting groove together form a mounting hole, and the first rotating shaft is radially limited by means of the mounting hole.

[0010] In one embodiment, the first rotating shaft passes through a connector, the connector including a first connecting portion and a second connecting portion and a limiting portion respectively disposed on both sides of the first connecting portion. The bend-angle transmission structure is disposed in a base. The first connecting portion of the connector is installed in a second mounting groove on the side wall of the base. The second connecting portion of the connector extends to the outside of the base and is used to pass through the mounting object so that the switch is installed on the mounting object. The limiting portion abuts against the inside of the base to form an installation limiting of the connector. The first rotating shaft, by passing through the connector, has its operating handle at its end located outside the mounting object.

[0011] In one embodiment, the outer periphery of the first connecting part is a non-circular structure, the first connecting part and the side wall of the second mounting groove abut against each other to form a non-rotational fit, the outer periphery of the second connecting part has a positioning structure, the second connecting part is used to pass through the insertion hole of the mounting object, and the positioning structure is used to form a positioning fit with the inner wall of the insertion hole. By means of the positioning fit and the non-rotational fit, the switch electrical appliance is positioned relative to the mounting object.

[0012] In one embodiment, a shunt excitation assembly connected to the second rotating shaft is further included. The shunt excitation assembly is used to drive the moving contact group to rotate by rotating the second rotating shaft, thereby driving the moving contact group to rotate via the operating handle or the shunt excitation assembly.

[0013] In one embodiment, the switching device is a disconnecting switch or a circuit breaker.

[0014] The beneficial effects of this utility model are as follows: By setting a bend-angle operating mechanism, this utility model transmits the rotation bend-angle transmission structure of the operating handle and the first rotating shaft to the second rotating shaft forming an angle with it, and then drives the moving contact group to rotate, thereby achieving the purpose of operating the moving contact group. It can also set the axial direction of the operating handle and the moving contact group to be offset, for example, the operating handle rotating shaft is perpendicular to the axial direction of the moving contact group, which optimizes the layout of the switchgear. Compared with the existing inline disconnect switch, it can reduce the height of the circuit breaker or disconnect switch and other switchgear, making it adaptable to the needs of miniaturization. Attached Figure Description

[0015] Figure 1 This is a perspective view of an embodiment of the present utility model.

[0016] Figure 2 This is an exploded view of an embodiment of this utility model.

[0017] Figure 3 This is a partial structural diagram of a component of an embodiment of this utility model.

[0018] Figure 4 This is a perspective view of the curved operating mechanism without the top cover according to an embodiment of the present utility model.

[0019] Figure 5 This is a perspective view of the installation state of an embodiment of this utility model.

[0020] Figure 6 This is an exploded view of the installation state of an embodiment of this utility model.

[0021] The components include: 1. Angle operating mechanism, 11. First rotating shaft, 111. Protrusion, 12. Second rotating shaft, 13. Operating handle, 14. Angle transmission structure, 141. First bevel gear, 142. Second bevel gear, 15. Housing assembly, 151. Mounting part, 152. Base, 153. Top cover, 154. Mounting hole, 16. Connector, 161. First connecting part, 162. Second connecting part, 1620. Positioning plane, 163. Limiting part, 164. Connecting hole, 17. Nut, 2. Contact system, 21. Housing, 22. Rotating shaft, 3. Mounting object, 31. Plug-in hole, 4. Shunt excitation assembly. Detailed Implementation

[0022] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0023] This utility model discloses a switching device, see reference. Figures 1 to 4 As shown, the switching device in this embodiment takes a disconnecting switch as an example. The disconnecting switch includes a bend-angle operating mechanism 1 and a contact system 2. The contact system 2 includes a housing 21 and a moving contact group and a stationary contact group disposed within the housing 21. The rotating shaft 22 of the moving contact group protrudes from the housing 21 and is driven to the bend-angle operating mechanism 1, so that the moving contact group is driven to the bend-angle operating mechanism 1 and rotates under the driving action of the bend-angle operating mechanism 1. The rotation of the moving contact group breaks or engages with the stationary contact group. The bend-angle operating mechanism 1 includes a first rotating shaft 11 and a second rotating shaft 12 that are perpendicular to each other. The end of the first rotating shaft 11 is provided with an operating handle 13, which is fixedly connected to the first rotating shaft 11 by a bolt to drive the first rotating shaft 11 to rotate. The first rotating shaft 11 and the second rotating shaft 12 are connected by a bend-angle transmission structure 14, so that the rotation of the first rotating shaft 11 is transmitted to the second rotating shaft 12 through the bend-angle transmission structure 14. The second rotating shaft 12 is connected to the moving contact group to drive the moving contact group to rotate.

[0024] This invention, by setting a bent-angle operating mechanism 1, transmits the rotation of the operating handle 13 and the first rotating shaft 11 to the second rotating shaft 12 perpendicular to it via a bent-angle transmission structure 14, which then drives the moving contact group to rotate, thereby achieving the purpose of operating the moving contact group. It also allows the rotating shaft of the operating handle 13 to be perpendicular to the axial direction of the moving contact group, optimizing the layout of the switching device. Compared to existing inline disconnect switches, it can reduce the height of circuit breakers or disconnect switches, making them suitable for miniaturization. The height of the switching device mentioned in this invention refers to its dimension in the direction of the second rotating shaft 12. Since the second rotating shaft 12 and the moving contact group of the disconnect switch in this embodiment are coaxial, the height of the disconnect switch is also the axial dimension of the moving contact group.

[0025] In this embodiment, the bend-angle transmission structure 14 is a bevel gear structure, including a first bevel gear 141 and a second bevel gear 142. The first bevel gear 141 is synchronously rotatably connected to and coaxial with the first rotating shaft 11, and the second bevel gear 142 is synchronously rotatably connected to and coaxial with the second rotating shaft 12. In other embodiments, the bend-angle transmission structure 14 can also be a toothed transmission structure formed by a worm gear. Unlike the bevel gear structure, the two rotating shafts of the bevel gear transmission structure are coplanar, while the rotating shafts of the worm gear transmission structure are not coplanar, making it suitable for eccentric mounting of the operating handle relative to the moving contact assembly. In addition to the toothed transmission structures such as the bevel gear structure and worm gear structure described above, other non-toothed transmission structures can also be used to achieve 90° bend-angle transmission, such as universal joints. Compared with other non-toothed transmission structures, toothed transmission structures offer more precise transmission and facilitate adjustment of the transmission ratio.

[0026] The angle-bending operating mechanism 1 also includes a housing assembly 15. An angle-bending transmission structure 14 formed by the first bevel gear 141 and the second bevel gear 142 is disposed inside the housing assembly 15. A first rotating shaft 11 passes through the housing assembly 15 and its end extends to the outside of the housing assembly 15 and is connected to the operating handle 13. Two protrusions 111 are provided on the outer circumferential surface of the first rotating shaft 11, which are spaced apart along its axial direction. The housing assembly 15 is provided with a mounting part 151. The two protrusions 111 are respectively disposed on both sides of the mounting part 151, and the protrusions 111 and the mounting part 151 form an abutting fit to fix the first rotating shaft 11 axially to the housing assembly 15. Since the bend-angle operating mechanism 1 needs to drive the moving contact group, which in many cases includes multiple moving contacts that move synchronously, and there may be other structures between the bend-angle operating mechanism 1 and the moving contact group (such as the shunt excitation assembly 4 described below), the operator needs to use a relatively large force to rotate the operating handle 13. However, the bevel gear only has a single-sided limit facing the small end, and there is no reliable limit on the side facing the large end. During rotation, due to operational errors, the reaction force of the moving contact group, or vibration of the switching device, the first bevel gear 141 and the first rotating shaft 11 may move towards the direction of the large end, causing the bevel gear structure to disengage. To solve this problem, this embodiment uses the abutment of the two protrusions 111 and the mounting part 151 to form an axial limit on the first rotating shaft 11, thereby preventing the first bevel gear 141 and the first rotating shaft 11 from moving towards the direction of the large end and ensuring the reliability of the bevel gear meshing.

[0027] The housing assembly 15 of this embodiment includes a base 152 and a top cover 153. A mounting part 151 is disposed on the base 152. The mounting part 151 has a semi-cylindrical first mounting groove. The opening of the first mounting groove faces the direction of the top cover 153. A first rotating shaft 11 is disposed on the first mounting groove to form a radial positioning and can rotate within the mounting part 151. Thus, the first rotating shaft 11 can rotate with the rotation of the operating handle 13 and drive the first bevel gear 141 to rotate. The base 152 has a second mounting groove on its side wall, and the top cover 153 has a third mounting groove. The first rotating shaft 11 is directly mounted in the first mounting groove, and the first rotating shaft 11 is also indirectly mounted in the second mounting groove by means of a connector 16. The first and second mounting grooves are distributed along the axial direction of the first rotating shaft 11, so that the first and second mounting grooves cooperate to form a support for the first rotating shaft 11. The second mounting groove of the base 152 and the third mounting groove of the top cover 153 together form a mounting hole 154, which indirectly forms a radial limit for the first rotating shaft 11. As can be seen from the above analysis, the first bevel gear 141 has the risk of disengaging from the second bevel gear 142. The radial limit can restrict the radial movement of the first rotating shaft 11, thereby preventing the first bevel gear 141 connected to the first rotating shaft 11 from moving radially on the first rotating shaft 11, thus ensuring reliable meshing of the first bevel gear 141 and the second bevel gear 142, and further ensuring the reliability of the bevel transmission structure.

[0028] Furthermore, the abutment between the protrusion 111 and the mounting portion 151 in the axial direction of the first rotating shaft 11 determines that the first rotating shaft 11 can only be installed radially onto the base 152. In this embodiment, the direction of the upper cover 153 relative to the base 152 is set to be the same as the opening direction of the first mounting groove. During installation, the first bevel gear 141 is first installed on the end of the first rotating shaft 11, the first rotating shaft 11 is inserted into the connector 16, and then the small assembly formed by the first rotating shaft 11, the first bevel gear 141 and the connector 16 is placed on the base 152. On 52, the two protrusions 111 of the first rotating shaft 11 respectively abut against the two sides of the mounting part 151, and the part between the two protrusions 111 is supported by the first mounting groove (that is, the first rotating shaft 11 is directly mounted in the first mounting groove), the connector 16 is supported by the second mounting groove (that is, the first rotating shaft 11 is indirectly mounted in the second mounting groove), the first bevel gear 141 meshes with the second bevel gear 142, and then the upper cover 153 is placed on the base 152, so that the second mounting groove and the third mounting groove cooperate to form the mounting hole 154.

[0029] See Figures 2 to 6As shown, the connector 16 includes a first connecting portion 161 that is fitted into the mounting hole 154, and a second connecting portion 162 and a limiting portion 163 respectively disposed on both sides of the first connecting portion 161. The second connecting portion 162 extends beyond the base 152 and is used to pass through the mounting object 3 so that the disconnecting switch is installed on the mounting object 3. The limiting portion 163 abuts against the inner side of the base 152 to form a mounting limit for the connector 16. The first rotating shaft 11, by means of the connector 16, has its operating handle 13 at its end located outside the mounting object 3. In this embodiment, the second connecting portion 162 has an external thread. The second connecting portion 162 is used to pass through the mounting object 3 and is threadedly connected to a nut 17, so that the switch is installed on the mounting object 3 by means of the threaded connection between the second connecting portion 162 and the nut 17. Figure 5 and Figure 6 The disconnect switch is installed on the mounting object via a threaded connection between the second connecting part 162 and the nut 17. The connecting part 16 also has a connecting hole 164 that passes through the connecting part 16. The first rotating shaft 11 passes through the connecting hole 164, so that the operating handle 13 at its end is located on the outside of the mounting object. In this embodiment, the installation of the disconnect switch and its component, the first rotating shaft 11, are both achieved by means of the connecting part 16. On the one hand, this allows for side mounting of the disconnect switch, increasing the installation methods of the disconnect switch; on the other hand, since the installation of the disconnect switch and the first rotating shaft 11 both need to pass through the side wall of the mounting object, this embodiment installs the first rotating shaft 11 on the second connecting part 162, which can be achieved by only opening a hole in the mounting object. It also simplifies the connection relationship between the first rotating shaft and the mounting object by means of the second connecting part.

[0030] It should be noted that the installation object is not part of the switch (in this embodiment, it refers to the disconnecting switch), but rather a component that mounts and fixes the switch, which can be a bracket, a mounting base, etc. In this invention, the outer side of the installation object refers to the side of the installation object opposite to the switch. The side where the switch is mounted on the installation object and where its main structure (the bend transmission structure 14 of the bend operating mechanism 1, the housing assembly 15, and the contact system 2) is located is the inner side of the installation object, and the opposite side is the outer side.

[0031] Mounting hole 154 is a through hole for anti-rotation structure. Specifically, in this embodiment, it is a square hole. The second mounting groove and the third mounting groove are square grooves. The outer periphery of the first connecting part 161 is a non-circular structure. Specifically, in this embodiment, it is a square structure. Thus, the first connecting part 161 and the second mounting groove form an anti-rotation fit. The first connecting part 161 is provided in mounting hole 154 and the sidewalls of the two match. That is, the sidewalls of the first connecting part 161 and mounting hole 154 are in contact. Thus, the connector 16 forms a rotation limit by means of the connection between the first connecting part 161 and mounting hole 154. That is, the connector 16 and the housing assembly 15 are in a non-rotatable fit. In other embodiments, the mounting hole 154 may also be a through hole with other anti-rotation structures, such as an elliptical hole, a triangular hole, a positioning structure, and a D-shaped hole with curved surfaces, etc., which are non-circular through holes. Correspondingly, the outer periphery of the first connecting part 161 is a non-circular structure corresponding to the structure of the mounting hole 154, such as an elliptical, triangular, positioning structure, and D-shaped hole with curved surfaces, etc., so that the first connecting part 161 is not rotatable in the mounting hole 154.

[0032] The limiting part 163 is installed inside the housing assembly 15 and its outer frame size is larger than the mounting hole 154. The limiting part 163 abuts against the inner wall of the base 152, thereby the connector 16 is limited to translation towards the outside of the housing assembly 15 by means of the limiting part 163. Through the abutment between the limiting part 163 and the inner wall of the base 152 and the threaded connection between the second connecting part 162 and the nut 17, the connector 16 forms a relatively fixed connection with the housing assembly 15 and the mounting object 3. The outer periphery of the second connecting part 162 has a positioning structure. In this embodiment, the positioning structure is provided on the positioning plane 1620 of the second connecting part 162. In other embodiments, it can also be a protrusion or a groove. However, it should be noted that it corresponds to the inner wall of the insertion hole 31 of the mounting object 3 to form the following positioning fit. The second connecting part 162 is used to pass through the insertion hole 31 of the mounting object 3, and the positioning plane 1620 is used to form a positioning fit with the inner wall of the insertion hole 31. By means of the positioning fit and the anti-rotation fit of the first connecting part 161 and the second mounting groove, the disconnecting switch is positioned relative to the mounting object 3. Since the disconnector is installed and fixed by the threaded connection between the second connecting part 162 and the nut 17, the process of screwing the nut 17 into the second connecting part 162 may cause the second connecting part 162 or even the disconnector as a whole to rotate, which is not conducive to the accurate installation of the disconnector. The positioning fit between the second connecting part 162 and the plug hole 31 can restrict the rotation of the second connecting part 162. Combined with the non-rotatable fit between the first connecting part 161 and the housing assembly 15, the rotation of the disconnector is restricted, thereby ensuring the accurate installation of the disconnector. On the other hand, the positioning fit between the second connecting part 162 and the plug hole 31 can form the installation positioning of the disconnector, preventing the disconnector from being misaligned around the second connecting part 162 during installation, which would lead to inaccurate installation, further ensuring the accurate installation of the disconnector.

[0033] This utility model also includes a shunt excitation assembly 4 connected to the second rotating shaft 12. The shunt excitation assembly 4 is used to drive the moving contact group to rotate by rotating the second rotating shaft 12, so that the moving contact group rotates by operating the handle 13 or by driving the shunt excitation assembly 4. The connection between the shunt excitation assembly 4 and the second rotating shaft 12, as well as the principle of the shunt excitation assembly 4, are not part of the improvements of this utility model and will not be described here.

[0034] In this embodiment, the rotation center axis of the moving contact assembly is coaxial with the second rotating shaft 12, and the moving contact assembly is separated from or engaged with the stationary contact assembly by rotation. In other embodiments, the rotation center axis of the moving contact assembly and the second rotating shaft 12 can also be connected by different axes, for example, by setting a gear set between them to offset the center axis.

[0035] In the above embodiment, the first rotating shaft 11 and the second rotating shaft 12 are perpendicular to each other, that is, the axial perpendicularity between the operating handle 13 and the moving contact group is achieved through the bevel transmission structure 14. In other embodiments, the included angle between the first rotating shaft 11 and the second rotating shaft 12 can also be other angles, such as 60° or 120°, which can be achieved by changing the pitch cone angle of the bevel gear and other related parameters.

[0036] The switching device in the above embodiment is a disconnecting switch; in other embodiments, the switching device may also be a circuit breaker.

[0037] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that the remaining undescribed parts are prior art, and that all changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.

Claims

1. A switching device, characterized in that: The device includes a bend-angle operating mechanism and a moving contact assembly connected to the bend-angle operating mechanism. The bend-angle operating mechanism includes a first rotating shaft and a second rotating shaft with an included angle. An operating handle is provided at the end of the first rotating shaft. The operating handle is used to drive the first rotating shaft to rotate. The first rotating shaft and the second rotating shaft are connected by a bend-angle transmission structure, thereby transmitting the rotation of the first rotating shaft to the second rotating shaft through the bend-angle transmission structure. The second rotating shaft is connected to the moving contact assembly to drive the moving contact assembly to rotate.

2. The switching device according to claim 1, characterized in that: The aforementioned bend-angle transmission structure is a toothed transmission structure.

3. A switching device according to claim 1, characterized in that: The included angle between the first rotating shaft and the second rotating shaft is 90°.

4. A switching device according to claim 2 or 3, characterized in that: The bend-angle transmission structure is a bevel gear structure, including a first bevel gear and a second bevel gear. The first bevel gear is synchronously rotatably connected to the first rotating shaft and is coaxial with the first rotating shaft. The second bevel gear is synchronously rotatably connected to the second rotating shaft and is coaxial with the second rotating shaft.

5. A switching device according to claim 1, characterized in that: The bending angle operating mechanism includes a housing assembly, the bending angle transmission structure is disposed within the housing assembly, the first rotating shaft passes through the housing assembly and its end extends to the outside of the housing assembly and connects to the operating handle, the outer circumferential surface of the first rotating shaft is provided with two protrusions arranged at intervals along its axial direction, the housing assembly is provided with a mounting part, the two protrusions are respectively disposed on both sides of the mounting part, and the protrusions and the mounting part form an abutting fit to fix the first rotating shaft axially to the housing assembly.

6. A switching device according to claim 5, characterized in that: The housing assembly includes a base and a top cover. The mounting portion is disposed on the base and has a first mounting groove with an opening facing the top cover. The base has a second mounting groove with the same opening direction as the first mounting groove. The top cover has a third mounting groove. The first mounting groove and the second mounting groove are distributed along the axial direction of the first rotating shaft. The first rotating shaft is directly or indirectly mounted in the first mounting groove and the second mounting groove. The base and the top cover cooperate to form a mounting hole by the second mounting groove and the third mounting groove. The first rotating shaft is radially limited by the mounting hole.

7. A switching device according to claim 1, characterized in that: The first rotating shaft passes through a connector, the connector including a first connecting portion and a second connecting portion and a limiting portion respectively disposed on both sides of the first connecting portion. The bend-angle transmission structure is disposed in a base. The first connecting portion of the connector is installed in a second mounting groove on the side wall of the base. The second connecting portion of the connector extends to the outside of the base and is used to pass through the mounting object so that the switch electrical appliance is installed on the mounting object. The limiting portion abuts against the inside of the base to form the mounting limiting of the connector. The first rotating shaft, by passing through the connector, has its operating handle at its end located outside the mounting object.

8. A switching device according to claim 7, characterized in that: The outer periphery of the first connecting part is a non-circular structure. The first connecting part and the side wall of the second mounting groove abut against each other to form a non-rotational fit. The outer periphery of the second connecting part has a positioning structure. The second connecting part is used to pass through the insertion hole of the mounting object, and the positioning structure is used to form a positioning fit with the inner wall of the insertion hole. By means of the positioning fit and the non-rotational fit, the switch electrical appliance is positioned relative to the mounting object.

9. A switching device according to claim 1, characterized in that: It also includes a shunt excitation assembly connected to the second rotating shaft. The shunt excitation assembly is used to drive the moving contact group to rotate by rotating the second rotating shaft, so that the moving contact group can be driven to rotate by the operating handle or the shunt excitation assembly.

10. A switching device according to claim 1, characterized in that: The switching device is a disconnecting switch or a circuit breaker.

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