Grounding interlocking mechanism of switch cabinet

Abstract

The utility model discloses a grounding interlocking mechanism of a switch cabinet. The grounding interlocking mechanism comprises a fixed part fixedly installed on the switch cabinet, a movable part hinged with the fixed part, and a spring bolt used for being limited when a handcart is switched on. According to the utility model, the movable piece is matched with the spring bolt, and the special-shaped hole arranged on the movable piece is combined, so that the closing and opening states of the handcart and the opening and closing states of the grounding switch can be simply and effectively associated through the special-shaped hole, and the grounding switch is limited to be not closed through the abutting edge when the handcart is closed; when the grounding switch is switched on, the spring bolt is limited through the movable part, so that the handcart cannot be switched on, and the five-prevention requirement is met. Through the special-shaped holes, the structure is simple, errors are effectively limited, the device can be suitable for most of spring bolts within the length range in the market, the applicability is high, the arrangement of the special-shaped holes considers component installation errors and mechanical loss, and the five-prevention requirement can be guaranteed in long-term use.

Description

Technical Field

[0001] The utility model belongs to the field related to switch cabinet equipment and relates to a switch cabinet grounding interlocking mechanism. Background Art

[0002] According to the five electrical protection requirements, it is strictly forbidden to close the grounding switch when the trolley in the switch cabinet is in the working position. When the grounding switch is closed, it is strictly forbidden to swing the trolley into the working position.

[0003] In order to meet the five-protection requirements, most of the existing switch cabinets are equipped with interlocking mechanisms to control the safe closing and opening of trolleys and earthing switches. However, the design structure of most interlocking mechanisms is relatively complex, with large mechanical friction, and the five-protection failure is easy to occur during long-term use. In addition, the complex structure leads to large component errors and installation errors, and the loss during use is large, which easily leads to poor interlocking accuracy, further affecting the five-protection effect. Furthermore, the specifications of circuit breakers from different manufacturers on the market are different. Most of the existing interlocking mechanisms can only be applied to their own specific switch cabinets, and cannot cover the market's multi-specification requirements, and have poor applicability. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a switch cabinet grounding interlocking mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A switch cabinet grounding interlocking mechanism comprises a fixing part fixedly mounted on the switch cabinet, a movable part hinged to the fixing part, and a lock tongue which is limited when a trolley is closed. The switch cabinet is provided with a grounding switch, an operating shaft for driving the grounding switch to close and open, and an operating shaft connecting rod connected to the operating shaft. The operating shaft connecting rod is provided with a first pin shaft, and a special-shaped hole is opened on the movable part. The first pin shaft is penetrated into the special-shaped hole. The trolley comprises a working position and a test position in the switch cabinet. In the working position, the trolley is closed, the movable part abuts against the lock tongue, and an abutting edge for blocking the movement of the first pin shaft is formed in the special-shaped hole. In the test position, the trolley is opened, and the first pin shaft drives the grounding switch to close or open during the movement of the special-shaped hole.

[0007] Furthermore, the fixing part includes a side panel and an interlocking fixing bracket, the side panel is fixedly installed on the switch cabinet, the interlocking fixing bracket is fixedly connected to the side panel, the movable part is hinged to the interlocking fixing bracket, and the lock tongue is passed through the side panel and protrudes from the side panel at a set length.

[0008] Furthermore, it also includes a handle connecting rod, on which a second pin is provided. The second pin is inserted into the special-shaped hole, and the handle connecting rod is provided with a manual structure for driving the operating shaft.

[0009] Furthermore, the special-shaped hole includes a straight groove and a triangular groove, the straight groove includes an upper half and a lower half, the triangular groove is connected to the upper half of the straight groove, one side edge of the triangular groove overlaps with the straight groove, and the other side edge forms the abutting edge.

[0010] Furthermore, the movable part includes a rotating shaft, an operating shaft welding plate, and a handle welding plate. The operating shaft welding plate and the handle welding plate are respectively fixedly connected to the two ends of the rotating shaft in the axial direction. The number of the special-shaped holes is set to two, and they are respectively arranged on the operating shaft welding plate and the handle welding plate. The first pin shaft is passed through the special-shaped hole of the operating shaft welding plate, and the second pin shaft is passed through the special-shaped hole of the handle welding plate.

[0011] Furthermore, the two special-shaped holes are projected to overlap in the axial direction of the rotating shaft.

[0012] Furthermore, the interlocking fixing bracket is provided with two sliding grooves for respectively passing the first pin shaft and the second pin shaft.

[0013] Furthermore, the manual structure includes a handle, a separation plate fixedly arranged on the handle connecting rod, and a baffle fixedly arranged in the switch cabinet, and the separation plate is provided with a socket for inserting the handle.

[0014] Furthermore, a reset structure is provided on the handle connecting rod, and the reset structure includes a spring, and two ends of the spring are respectively connected to the handle connecting rod and the switch cabinet.

[0015] Furthermore, it also includes a fixed coaxial shaft, the two ends of which are respectively fixed to the operating shaft welding plate and the handle welding plate, and the fixed coaxial shaft is parallel to the rotating axis.

[0016] In summary, the utility model is beneficial in that:

[0017] The utility model adopts the form of cooperation between the movable part and the lock tongue, combined with the special-shaped hole arranged on the movable part, which can simply and effectively associate the closing and opening states of the trolley with the closing and opening states of the earthing switch through the special-shaped hole. When the trolley is closed, the earthing switch is restricted from being closed by the abutting edge. When the earthing switch is closed, the lock tongue is restricted by the movable part, so that the trolley cannot be closed, thereby meeting the five-protection requirements. It is achieved by the special-shaped hole, has a simple structure, effectively limits errors, and can be applied to lock tongues within most length ranges on the market, has strong applicability, and the setting of the special-shaped hole takes into account component installation errors and mechanical losses, and can also ensure the five-protection requirements during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the grounding interlocking mechanism of the switch cabinet of the present utility model.

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the trolley lock tongue mechanism, operating shaft connecting rod and handle connecting rod.

[0020] Figure 3 for Figure 2 Schematic diagram of the structure of the trolley lock tongue mechanism.

[0021] Figure 4 for Figure 3 Explosion diagram in .

[0022] Figure 5 This is a schematic diagram of the structure of the handle welding plate.

[0023] Figure 6 This is one of the matching state relationship diagrams between the pin and the special-shaped hole.

[0024] Figure 7 This is another diagram showing the matching relationship between the pin and the special-shaped hole.

[0025] Markings in the figure: 1. operating shaft connecting rod; 11. first pin shaft; 12. operating shaft; 13. earthing switch; 2. trolley lock tongue mechanism; 21. interlocking fixed bracket; 211. slide groove; 22. operating shaft welding plate; 221. first special-shaped hole; 23. handle welding plate; 231. second special-shaped hole; 2311. linear groove; 2312. triangular groove; 232. baffle rod; 24. rotating shaft; 241. fixed coaxial; 3. handle connecting rod; 31. second pin shaft; 32. handle; 33. split plate; 34. baffle plate; 4. side plate; 41. lock tongue. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0027] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0028] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0030] The utility model provides a switch cabinet grounding interlocking mechanism, which is arranged inside the switch cabinet and is mainly used for interlocking with the action structure of the trolley to confirm the position state of the trolley and interlocking with the grounding knife for controlling the opening and closing of the grounding switch 13 to ensure that the states of the grounding switch 13 and the trolley do not conflict.

[0031] Specifically, the trolley includes a working position and a test position in the switch cabinet. In the working position, the trolley is pushed into place in the switch cabinet, and the trolley is connected to the load of the switch cabinet. At this time, it is necessary to ensure that the grounding switch 13 is in a disconnected state to avoid causing a short circuit; in the test position, the trolley is moved out and disconnected from the load of the switch cabinet. At this time, the grounding switch 13 can be connected or disconnected, depending on whether the switch cabinet is energized. If it is energized, the grounding switch 13 needs to be connected to avoid the risk of leakage.

[0032] The switch cabinet provided in this embodiment has a greater depth structure than the common switch cabinets on the market. Figure 1The interlocking mechanism in this embodiment is arranged at the front end of the switch cabinet, and the actuating member in the grounding switch 13, i.e., the grounding knife, is arranged at the rear end of the switch cabinet. The grounding knife and the interlocking mechanism are connected and transmitted through an operating shaft 12. For the on and off of the grounding switch 13, in this embodiment, an electric structure can be arranged at the rear end to directly drive the action of the grounding knife, and then the grounding knife drives the rotation of the operating shaft 12 to be transmitted to the front end; or a manual structure can be arranged at the front end to drive the rotation of the operating shaft 12 and then transmit it to the rear end to drive the action of the grounding knife.

[0033] Reference Figure 2 The grounding interlocking mechanism includes an operating shaft connecting rod 1, a handle connecting rod 3 and a trolley lock tongue mechanism 2. The upper and lower ends of the operating shaft connecting rod 1 are respectively connected to the operating shaft 12 and the trolley lock tongue mechanism 2. The operating shaft 12 may be provided with an eccentric wheel or disc structure. The upper end of the operating shaft connecting rod 1 acts on or is connected to the outer periphery of the eccentric wheel or the disc. There are many similar structural applications of this connection structure in the existing eccentric reciprocating transmission structure. In this embodiment, it is mainly to enable the operating shaft 12 to rotate and drive the operating shaft connecting rod 1 to move up and down in a vertical direction, and when the grounding switch 13 is switched from the open state to the closed state, the operating shaft connecting rod 1 moves downward, so the structure is not described in detail here.

[0034] The lower end of the handle link 3 is connected to the trolley lock tongue mechanism 2, a handle 32 for user operation is provided in the middle of the handle link 3, and the manual structure is provided on the upper part. The user can drive the handle link 3 to move in a vertical direction through the handle 32, and a reset structure is also provided on the handle link 3. The reset structure adopts a spring or a torsion spring, which is connected and installed inside the switch cabinet to keep the handle link 3 in the initial position when not affected by external force. When the user operates, the handle link 3 is moved downward from the initial position.

[0035] Reference Figure 3 and Figure 4 The trolley lock tongue mechanism 2 includes a handle welding plate 23, an operating shaft welding plate 22, and an interlocking fixed bracket 21. A side panel 4 is provided in the cabinet body of the switch cabinet. The interlocking fixed bracket 21 is fixedly installed on the side panel 4. A rotating shaft 24 is passed through the interlocking fixed bracket 21. The rotating shaft 24 can rotate relative to the interlocking fixed bracket 21. The axial ends of the rotating shaft 24 are respectively welded and fixed to the handle welding plate 23 and the operating shaft welding plate 22, so that the handle welding plate 23 and the operating shaft welding plate 22 can rotate synchronously with the axis of the rotating shaft 24 as the rotating axis.

[0036] A fixed coaxial shaft 241 is also provided between the handle welding plate 23 and the operating shaft welding plate 22 to enhance the position stability between the two welding plates and avoid misalignment caused by insufficient connection strength of the rotating shaft 24 . The fixed coaxial shaft 241 is arranged parallel to the rotating shaft 24 .

[0037] The operating shaft welding plate 22 is provided with a first shaped hole 221, and the handle welding plate 23 is provided with a second shaped hole 231. The first shaped hole 221 and the second shaped hole 231 can be set to be the same or similar in shape, and overlap in the axial projection of the rotating shaft 24. For details, refer to Figure 5 The special-shaped hole includes a straight groove 2311 and a triangular groove 2312. The triangular groove 2312 is arranged in the upper half of the straight groove 2311, and one side of the triangular groove 2312 coincides with the straight groove 2311, and the lower sides of the other two sides are formed as abutting sides.

[0038] The bottom ends of the operating shaft link 1 and the handle link 3 are respectively provided with a first pin shaft 11 and a second pin shaft 31. The first pin shaft 11 is penetrated into the first special-shaped hole 221, and the second pin shaft 31 is penetrated into the second special-shaped hole 231. The movements of the operating shaft link 1 and the handle link 3 will respectively drive the two pin shafts to move in the corresponding special-shaped holes.

[0039] The side plate 4 is provided with a hole for passing a locking tongue 41, and the locking tongue 41 is located near the trolley locking tongue mechanism 2. When the trolley is switched between the working position and the test position, the locking tongue 41 is extended and retracted on the side plate 4 toward one side of the trolley locking tongue mechanism 2. Specifically, in the test position, the end of the locking tongue 41 does not exceed the surface of the side plate 4, and in the working position, the locking tongue 41 will extend out of the side plate 4 driven by the trolley.

[0040] A stopper 232 is also provided at the bottom of the handle welding plate 23 . When the handle welding plate 23 is rotating, the stopper 232 will abut against the end of the locking tongue 41 , and the abutting position depends on the length of the locking tongue 41 .

[0041] The interlocking fixing bracket 21 is also provided with two slide grooves 211, which are used for the first pin shaft 11 and the second pin shaft 31 to be respectively inserted into the two slide grooves 211 after passing through the first special-shaped hole 221 and the second special-shaped hole 231, respectively. The slide groove 211 is a linear structure. In this embodiment, the slide groove 211 is vertical. The moving direction of the two pin shafts is limited by the slide groove 211. In this embodiment, when the lock tongue 41 is completely retracted into the side plate 4 and the blocking rod 232 is against the In the case of the side plate 4, the linear groove 2311 will coincide with the slide groove 211 in the axial direction of the rotating shaft 24. In other cases, the linear groove 2311 and the slide groove 211 are staggered to form a certain angle. Through the setting of the slide groove 211, when the handle welding plate 23 and the operating shaft welding plate 22 are pressed by the ejected locking tongue 41, the slide groove 211 staggered from the linear groove 2311 ensures that the first pin shaft 11 or the second pin shaft 31 will not be misaligned in the moving direction under abnormal external force.

[0042] Since the lengths of the circuit breaker lock tongues 41 of different manufacturers on the market are different, the applicable extension length of the lock tongue 41 in this embodiment is preferably 10-60 mm. Under the above extension length, when the blocking rod 232 abuts against the lock tongue 41, the direction of the straight groove 2311 in the special-shaped hole is staggered from the moving direction of the first pin shaft 11 or the second pin shaft 31, so that the first pin shaft 11 or the second pin shaft 31 cannot enter the lower half of the straight groove 2311, and can only be located in the triangular groove 2312, and will be limited by the abutting edge; in special circumstances, Under this circumstance, that is, when the extended length of the locking tongue 41 is within 10 mm, the linear groove 2311 still cannot coincide with the moving direction of the first pin 11 or the second pin 31, so that although the first pin 11 or the second pin 31 has a tendency to enter the lower half of the linear groove 2311, it cannot go deeper; only when the locking tongue 41 is completely located in the side plate 4 and does not protrude from the side plate 4, and the blocking rod 232 can be tightly attached to the side plate 4, the linear groove 2311 can coincide with the moving direction of the two pins.

[0043] The manual structure includes a handle and a separation plate 33 arranged on the upper part of the handle connecting rod 3. The separation plate 33 is provided with a socket for the handle to be inserted. A baffle 34 is provided on the rear side of the separation plate 33. The baffle 34 can be fixed to the switch cabinet body. In the initial position, the baffle 34 blocks the socket, so that the handle cannot be inserted to operate the operating shaft 12. Only when the handle connecting rod 3 moves downward into place, the socket can be fully exposed for the handle to be inserted.

[0044] When the trolley is in the working position, refer to Figure 6The locking tongue 41 is pushed by the trolley and extends out of the surface of the side plate 4 by a certain length, and is limited by the trolley so that it cannot be pushed even under the action of external force. At this time, the handle welding plate 23 and the operating shaft welding plate 22 can only rotate to the position where the blocking rod 232 abuts against the locking tongue 41, so that the straight groove 2311 of the special-shaped hole is staggered from the moving direction of the two pin shafts. At this time, the first pin shaft 11 moves downward along the corresponding first special-shaped hole 221, but cannot move to the bottom along the straight groove 2311, but is abutted by the abutting edge of the triangular groove 2312 and cannot move further downward, thereby affecting the downward movement of the operating shaft connecting rod 1 The movement range is limited, thereby limiting the rotation angle of the operating shaft 12, so that the ground knife cannot be closed and the grounding switch 13 cannot be closed; similarly, the second pin shaft 31 will be blocked by the abutting edge of the corresponding second special-shaped hole 231 when moving downward, so that the handle connecting rod 3 cannot move downward into place. The handle connecting rod 3 is a part manually operated by the user. When the user cannot move it downward into place, feedback is generated to inform the user of the status of the trolley. In addition, the inability of the handle to be inserted into the jack also makes it impossible for the user to operate the grounding switch 13, thereby avoiding misoperation and ensuring the safety of the trolley in the working state.

[0045] When the trolley is in the test position, the trolley is separated from the switch cabinet so that the locking tongue 41 is no longer restricted.

[0046] Reference Figure 6 At this time, the user can operate the handle connecting rod 3 downward to drive the handle welding plate 23 to rotate, and push the lock tongue 41 into the side plate 4 through the blocking rod 232, so that the blocking rod 232 is finally close to the side plate 4; similarly, the ground knife can also be driven by the electric structure at the rear end to drive the operating shaft 12 to rotate to drive the operating shaft connecting rod 1 to move downward, drive the operating shaft welding plate 22 to rotate, and push the lock tongue 41 into the side plate 4 through the blocking rod 232, so that the baffle plate 34 is finally close to the side plate 4.

[0047] When the blocking rod 232 is in close contact with the side plate 4, the straight grooves 2311 of the first special-shaped hole 221 and the second special-shaped hole 231 coincide with the moving directions of the two pin shafts, and the first pin shaft 11 and the second pin shaft 31 can move at any position in the corresponding straight grooves 2311, so that the closing operation of the grounding switch 13 can be performed at this time.

[0048] The closing operation includes: driving the ground knife to close through the electric structure, driving the operating shaft 12 to rotate and drive the operating shaft connecting rod 1 to move downward, and after the first pin shaft 11 enters the lower half of the linear groove 2311, the ground knife is closed; or through the manual structure, the user operates the handle connecting rod 3 to move downward, and the second pin shaft 31 moves into place, that is, when it moves to the bottom of the linear groove 2311, the socket is exposed for the handle to be inserted, thereby driving the operating shaft 12 to rotate to complete the closing of the ground knife.

[0049] Correspondingly, no matter the first pin shaft 11 or the second pin shaft 31 enters the lower half of the linear groove 2311 to complete the grounding and closing, it will in turn limit the operating shaft welding plate 22 or the handle welding plate 23, making it impossible to rotate, and then the lock tongue 41 is supported by the blocking rod 232, and the trolley cannot be rocked in at this time, ensuring safety.

[0050] In the present embodiment, since the operating shaft 12 passes through the front and rear ends of the switch cabinet, resulting in an excessively long depth, there are multiple connection parts. Many unavoidable component errors and installation errors result in certain losses in the transmission process. The loss is mainly reflected in the fact that when the operating shaft 12 rotates, the rotation angles of the front and rear ends are inconsistent. When the electric structure is used to drive the ground knife to rotate ninety degrees to complete the closing, the rotation angle transmitted to the front end of the operating shaft 12 may be only seventy-five degrees. Therefore, the stroke set in the lower half of the straight groove 2311 of the special-shaped hole in the present embodiment is mainly used to solve the transmission loss. Theoretically, when there is no loss, the pin shaft can move to the bottom of the straight groove 2311, but considering the loss, it is only necessary to ensure that the pin shaft is located in the lower half of the straight groove 2311 to achieve the locking effect of restricting the trolley from being shaken in.

[0051] Similarly, for the handle connecting rod 3, when the second pin shaft 31 enters the lower half of the linear groove 2311 but has not reached the bottom, it has the effect of limiting the swinging-in of the trolley. However, in order to eliminate the error at the handle connecting rod 3 and prevent some users from using brute force to operate, resulting in the situation where the handle can be inserted when it is not actually disconnected, or the trolley can be swinging in to close the earthing switch 13 when the earthing switch is closed, it is arranged in this embodiment that only when the second pin shaft 31 moves to the bottom of the linear groove 2311, the socket will be completely exposed for the handle to be inserted.

[0052] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A switch cabinet grounding interlocking mechanism, characterized in that: The invention comprises a fixing part fixedly mounted on the switch cabinet, a movable part hinged with the fixing part, and a lock tongue which is limited when the trolley is closed. The switch cabinet is provided with an earthing switch, an operating shaft for driving the earthing switch to close or open, and an operating shaft connecting rod connected with the operating shaft. The operating shaft connecting rod is provided with a first pin shaft, and a special-shaped hole is opened on the movable part, and the first pin shaft is penetrated into the special-shaped hole. The trolley comprises a working position and a test position in the switch cabinet. In the working position, the trolley is closed, the movable part abuts against the lock tongue, and an abutting edge for blocking the movement of the first pin shaft is formed in the special-shaped hole. In the test position, the trolley is opened, and the first pin shaft drives the earthing switch to close or open during the movement of the special-shaped hole.

2. A switch cabinet grounding interlocking mechanism according to claim 1, characterized in that: The fixing part includes a side plate and an interlocking fixing bracket, the side plate is fixedly installed on the switch cabinet, the interlocking fixing bracket is fixedly connected to the side plate, the movable part is hinged to the interlocking fixing bracket, and the locking tongue is inserted into the side plate and protrudes from the side plate with a set length.

3. A switch cabinet grounding interlocking mechanism according to claim 2, characterized in that: It also includes a handle connecting rod, on which a second pin is provided. The second pin is inserted into the special-shaped hole, and the handle connecting rod is provided with a manual structure for driving the operating shaft.

4. A switch cabinet grounding interlocking mechanism according to claim 3, characterized in that: The special-shaped hole includes a straight groove and a triangular groove, the straight groove includes an upper half and a lower half, the triangular groove is connected to the upper half of the straight groove, one side edge of the triangular groove overlaps with the straight groove, and the other side edge forms the abutting edge.

5. A switch cabinet grounding interlocking mechanism according to claim 4, characterized in that: The movable part includes a rotating shaft, an operating shaft welding plate, and a handle welding plate. The operating shaft welding plate and the handle welding plate are respectively fixedly connected to the two ends of the rotating shaft in the axial direction. The number of the special-shaped holes is set to two, and they are respectively arranged on the operating shaft welding plate and the handle welding plate. The first pin shaft is penetrated into the special-shaped hole of the operating shaft welding plate, and the second pin shaft is penetrated into the special-shaped hole of the handle welding plate.

6. A switch cabinet grounding interlocking mechanism according to claim 5, characterized in that: The two special-shaped holes overlap in projection in the axial direction of the rotating shaft.

7. A switch cabinet grounding interlocking mechanism according to claim 6, characterized in that: The interlocking fixing bracket is provided with two sliding grooves for respectively passing the first pin shaft and the second pin shaft.

8. A switch cabinet grounding interlocking mechanism according to claim 3, characterized in that: The manual structure comprises a handle, a separation plate fixedly arranged on the handle connecting rod, and a baffle fixedly arranged in the switch cabinet, and the separation plate is provided with a socket for inserting the handle.

9. A switch cabinet grounding interlocking mechanism according to claim 3, characterized in that: The handle connecting rod is provided with a reset structure, and the reset structure comprises a spring, and two ends of the spring are respectively connected to the handle connecting rod and the switch cabinet.

10. A switch cabinet grounding interlocking mechanism according to claim 5, characterized in that: It also includes a fixed coaxial shaft, the two ends of which are respectively fixed to the operating shaft welding plate and the handle welding plate, and the fixed coaxial shaft is parallel to the rotating shaft.

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