Mechanical interlocking mechanisms and isolation devices

Abstract

This utility model relates to the field of electrical equipment technology and discloses a mechanical interlocking mechanism and an isolation device. The mechanical interlocking mechanism includes: a support assembly with a first limiting hole; a program lock mounted on the support assembly for locking or unlocking the grounding operation hole of the isolation mechanism body; a first connecting rod and a second connecting rod, one end of the first connecting rod being connected to a grounding indicator shaft, the first end of the second connecting rod being pivotally connected to the other end of the first connecting rod, the second end passing through the first limiting hole, and having a second limiting hole; and a blocking member rotatably engaging with the support assembly along a second direction axis, the second direction being non-parallel to the first direction, the tongue of the blocking member being inserted into the second limiting hole and movable relative to the second limiting hole, the blocking member blocking the program lock when the grounding indicator shaft rotates to the grounding position, and the blocking member exposing the program lock when rotated to the grounding position. This mechanical interlocking mechanism can ensure that the key is blocked when the isolation device is switched to the isolation position, and has a simple structure and low cost.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a mechanical interlocking mechanism and isolation device. Background Technology

[0002] Some medium- and high-voltage power distribution systems include two incoming power supply cabinets and one sectionalizing cabinet (hereinafter referred to as equipment cabinets). Each equipment cabinet includes an isolation mechanism with three positions: "Isolation Closed," "Isolation Open (i.e., Grounding Open)," and "Grounding Closed." "Isolation Closed" is the working position of the equipment cabinet, and "Grounding Closed" is the maintenance position. Some isolation devices require the disconnect switch to be switched from Grounding Closed to Grounding Open (i.e., Isolation Open) before it can be switched back to Isolation Closed. In actual use, after two equipment cabinets are in working condition, it is necessary to ensure that the third equipment cabinet remains in maintenance condition to prevent power accidents caused by misoperation.

[0003] Therefore, all three isolation mechanisms are equipped with mechanical interlocking mechanisms, but only two keys are used (i.e., a three-lock, two-key system). Specifically, the key is used to unlock the isolating switch; that is, the isolating mechanism must be unlocked with the key before it can be switched from grounding closed to grounding open (i.e., isolating open), and then further operated to isolating closed. It must be ensured that when the user switches the isolating mechanism to grounding open and subsequently to isolating closed, the key cannot be removed due to the mechanical interlocking mechanism, ensuring that the isolating device of the third equipment cabinet cannot be unlocked when any two equipment cabinets are in operation. The key can only be removed from the isolating device when the isolating device with the key is switched to maintenance mode, allowing the unlocking of other equipment cabinets to enter operation.

[0004] In related technologies, mechanical interlocking devices include a blocking component, which is connected to the grounding indicator shaft of an isolation device. When the grounding indicator shaft rotates to the isolation position (i.e., the isolation device is under maintenance), it will cause the blocking component to block the key, preventing it from being removed. When the rotation directions of the grounding indicator shaft and the blocking component are not parallel, the transmission structure between them is complex and costly.

[0005] Therefore, there is an urgent need for a mechanical interlocking mechanism and isolation device to solve the above-mentioned technical problems. Utility Model Content

[0006] One objective of this invention is to provide a mechanical interlocking mechanism that can ensure the key is blocked when the isolation device switches to the isolation position, and has a simple structure and low cost.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A mechanical interlocking mechanism is mounted on the main body of an isolation mechanism, the main body of which includes a rotatable grounding indicator shaft extending along a first direction. The mechanical interlocking mechanism includes:

[0009] A bracket assembly is configured to be installed on the main body of the isolation mechanism, and the bracket assembly is provided with a first limiting hole;

[0010] A program lock, mounted on the bracket assembly, is used to engage with a key to lock or unlock the grounding operation hole of the isolation mechanism body;

[0011] A first link and a second link, one end of the first link is connected to the grounding indicator shaft, the first end of the second link is pivotally connected to the other end of the first link, the second end of the second link passes through the first limiting hole and can move relative to the first limiting hole, and the second end is provided with a second limiting hole;

[0012] The shielding member is rotatably engaged with the bracket assembly via a rotating shaft extending in a second direction, which is not parallel to the first direction. The shielding member is provided with a tongue portion, which is inserted into the second limiting hole and can move relative to the second limiting hole. When the grounding indicator shaft rotates to the grounding position, it causes the shielding member to shield the program lock. When it rotates to the grounding position, it causes the shielding member to expose the program lock.

[0013] As an alternative, the first limiting hole extends axially along a third direction and has a cross-section that is an elongated strip extending along the second direction. The second connecting rod passes through the first limiting hole along the third direction and is able to move relative to the first limiting hole along the second direction, which is perpendicular to both the first and second directions.

[0014] As an optional solution, the axial direction of the second limiting hole extends along the first direction, and the cross-section of the second limiting hole is rectangular. The dimension of the rectangle along the second direction is larger than the dimension of the tongue in the second direction, and the dimension of the rectangle along the third direction is larger than the thickness of the tongue. The inner wall of the second limiting hole is used to push the tongue to rotate so that the blocking member switches between the position of blocking the program lock and the position of exposing the program lock. The third direction is perpendicular to the first direction and the second direction, respectively.

[0015] As an optional solution, the shielding component further includes a connecting part and a shielding part. The connecting part is rotatably engaged with the bracket assembly, and the shielding part is connected to both ends of the connecting part and the tongue part, respectively. The shielding part can cover the program lock and the key installed on the program lock.

[0016] As an optional solution, the support assembly includes:

[0017] The first bracket is installed on the main body of the isolation mechanism, and the program lock is installed on the first bracket;

[0018] The second bracket is connected to the first bracket and extends at least partially outside the first bracket, and the first limiting hole is provided in the second bracket.

[0019] As an optional solution, the mechanical interlocking mechanism further includes:

[0020] A lock plate, which is connected to the program lock and configured to be driven to rotate by the key, and the lock plate is provided with a sliding groove;

[0021] A sliding pin is slidably engaged with the bracket assembly, with one end of the sliding pin extending into the slide groove and slidably engaged with the slide groove.

[0022] An operating baffle is connected to the sliding pin, and the operating baffle is configured to block or avoid the grounding operating hole of the main body of the isolation mechanism.

[0023] As an optional solution, the mechanical interlocking mechanism further includes a guide post, which is fixedly connected to the support assembly, and the sliding pin is sleeved on the guide post and slides in cooperation with the guide post.

[0024] As an alternative, the bracket assembly is provided with an obstacle clearance elongated hole, which extends along the sliding direction of the sliding pin, and the sliding pin passes through the obstacle clearance elongated hole and is connected to the operating baffle.

[0025] As an alternative, the bracket assembly includes a mating part, which is constructed as an elongated strip parallel to the direction of movement of the sliding pin. The mechanical interlocking mechanism also includes a sliding sleeve, which is connected to the operating baffle. The sliding sleeve and the sliding pin respectively abut against both sides of the mating part.

[0026] Another objective of this invention is to provide an isolation device that, by setting the aforementioned mechanical interlocking mechanism, can ensure that the key is blocked when the device is in the isolation working position, and has a simple structure and low cost.

[0027] To achieve this objective, the present invention adopts the following technical solution:

[0028] An isolation device includes an isolation mechanism body and the aforementioned mechanical interlocking mechanism. The isolation mechanism body includes a housing and a grounding indicator shaft. The grounding indicator shaft is rotatable relative to the housing and is used to indicate the grounding status of the isolation mechanism body. The support assembly is mounted on the housing, and the grounding operation hole is provided on the housing.

[0029] The beneficial effects of this utility model are:

[0030] This utility model's mechanical interlocking mechanism unlocks the grounding operation hole of the isolation device by inserting the key into the program lock and turning it. The user can then insert the operating handle into the grounding operation hole to switch the isolation device to the grounding off position. Next, inserting the operating handle into the isolation operation hole will further switch the isolation device to the grounding closed position. During the switching process, the grounding indicator shaft of the isolation device rotates, driving the first connecting rod to rotate. The first connecting rod drives the second connecting rod, which in turn drives a blocking component via a latch to block the program lock and the key, preventing the key from being removed. When the user switches the operating mechanism to the grounding closed position, the grounding indicator shaft of the isolation device rotates in the opposite direction, driving the first connecting rod to rotate. The first connecting rod drives the second connecting rod, which in turn drives the blocking component via a latch to rotate to expose the program lock, allowing the key to be removed. This isolation device can be applied to a three-lock, two-key system. Furthermore, the transmission between the non-parallel grounding indicator shaft and the rotating shaft of the shielding part can be achieved through the cooperation of the second connecting rod with the first limiting hole and the cooperation of the tongue with the second limiting hole. This eliminates the need for costly transmission components such as universal joints, resulting in a simple structure and low cost.

[0031] The isolation device of this utility model, by setting the above-mentioned mechanical interlocking mechanism, can ensure that the key is blocked when it is in the isolation working position, and has a simple structure and low cost. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the isolation device provided in a specific embodiment of the present invention when it is in the grounding and working position, viewed from one angle.

[0033] Figure 2 This is a schematic diagram of the isolation device provided in a specific embodiment of the present invention when it is in the isolation and assembly position, viewed from one angle.

[0034] Figure 3 This is a schematic diagram of the isolation device provided in a specific embodiment of the present invention when it is in the grounding and working position, from another perspective.

[0035] Figure 4 This is a structural schematic diagram of the isolation device provided in a specific embodiment of the present invention when it is in the isolation and assembly position, viewed from another perspective;

[0036] Figure 5 This is a schematic diagram of the mechanical interlocking mechanism provided in a specific embodiment of the present invention when the isolation device is in the grounding and working position;

[0037] Figure 6This is a schematic diagram of the mechanical interlocking mechanism provided in a specific embodiment of the present invention when the isolation device is in the isolation and engagement position.

[0038] In the picture:

[0039] 10. Main body of the isolation mechanism; 11. Shell; 111. Grounding operation hole; 112. Isolation operation hole;

[0040] 20. Mechanical interlocking mechanism; 21. Support assembly; 211. First support; 2111. Clearance elongated hole; 2112. Mating part; 2113. Side plate; 2114. Mounting plate; 212. Second support; 2121. First limiting hole; 22. Program lock; 23. First connecting rod; 231. Square hole; 24. Second connecting rod; 241. Second limiting hole; 25. Covering part; 251. Tongue part; 252. Connecting part; 253. Covering part; 26. Locking plate; 261. Slide groove; 27. Sliding pin; 28. Operating baffle; 29. ​​Guide post; 210. Sliding sleeve; 220. Rotating shaft;

[0041] 30. Grounding indicator shaft;

[0042] 40. Key;

[0043] 50. Isolation indicator axis. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0045] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0048] This embodiment provides a mechanical interlocking mechanism and isolation device, such as Figures 1-4 As shown, the isolation device includes an isolation mechanism body 10. The isolation mechanism body 10 is a conventional structure, having three positions: "Isolation Closed," "Isolation Disconnected," and "Ground Closed." "Isolation Closed" is the working position, and "Ground Closed" is the maintenance position. In this embodiment, the "Isolation Disconnected" position is essentially also the "Ground Closed." Figure 1 and Figure 2 As shown, the main body 10 of the isolation mechanism includes a housing 11, on which a grounding operation hole 111 and an isolation operation hole 112 are provided. When the user inserts the operating handle into the grounding operation hole 111, the isolation device can be switched between grounding open and grounding closed. When the isolation device is switched from grounding closed to grounding open, inserting the operating handle into the isolation operation hole 112 can switch the isolation device from isolation open to isolation closed. Figure 1 As shown, the isolation mechanism body 10 also includes a grounding indicator shaft 30, which indicates whether the current isolation mechanism is in the grounding closed or grounding open state. The isolation mechanism body 10 also includes an isolation indicator shaft 50, which indicates whether the current isolation device is in the isolation closed or isolation open state. In this embodiment, the grounding indicator shaft 30 extends along a first direction and rotatably engages with the housing 11. It should be noted that the grounding indicator shaft 30 and the isolation indicator shaft 50 rotate accordingly as the user performs a position switching operation on the isolation mechanism body 10. The specific transmission structure is an existing structure and will not be described in detail here.

[0049] When the isolating device is used in a power distribution system with a three-lock key 40, the isolating device is required to lock the grounding closed state. Only after the key 40 is unlocked can it switch to the grounding open state and then further switch to the isolating closed state (i.e., the working state). In addition, it is required that the key 40 cannot be removed when the isolating device is in the isolating closed state.

[0050] In this regard, such as Figures 3-6 As shown, the isolation device also includes a mechanical interlocking mechanism 20, which includes a support assembly 21, a program lock 22, a first connecting rod 23, a second connecting rod 24, and a blocking member 25. The support assembly 21 is mounted on the housing 11 and has a first limiting hole 2121. The program lock 22 is mounted on the support assembly 21 and is used to engage with the key 40 to lock or unlock the grounding operation hole 111 of the isolation mechanism body 10. One end of the first connecting rod 23 is connected to the grounding indicator shaft 30, the first end of the second connecting rod 24 is pivotally connected to the other end of the first connecting rod 23, the second end of the second connecting rod 24 passes through the first limiting hole 2121 and can move relative to the first limiting hole 2121, and the second end of the second connecting rod 24 has a second limiting hole 241. The blocking member 25 is rotatably engaged with the support assembly 21 via a rotating shaft 220 extending in a second direction, which is not parallel to the first direction. The shielding member 25 is provided with a tongue 251, which is inserted into the second limiting hole 241 and can move relative to the second limiting hole 241. When the grounding indicator shaft 30 rotates to the isolation position, it drives the shielding member 25 to block the program lock 22. When it rotates to the grounding position, it drives the shielding member 25 to expose the program lock 22. In this embodiment, the second direction is perpendicular to the first direction.

[0051] The isolation device in this embodiment, such as Figure 1As shown, after inserting the key 40 into the program lock 22 and turning the program lock 22, the grounding operation hole 111 of the isolation device can be unlocked. Then, the user can insert the operating handle into the grounding operation hole 111 to switch the isolation device to the grounding position. Then, the user can insert the operating handle into the isolation operation hole 112 to further switch the isolation device to the isolation position. During the process of switching the isolation device from grounding closed to grounding open, the grounding indicator shaft 30 of the isolation device rotates, driving the first link 23 to rotate. The first link 23 drives the second link 24 to move. The second link 24 then drives the blocking member 25 through the tongue to block the program lock 22 and the key 40 on it, so that the key 40 cannot be removed. When the user switches the operating mechanism to the grounding closed position, the grounding indicator shaft 30 of the isolation device rotates in the opposite direction, driving the first link 23 to rotate. The first link 23 drives the second link 24 to rotate. The second link 24 then drives the blocking member 25 to rotate to expose the program lock 22 through the tongue 251, so that the key 40 can be removed. Thus, the isolation device can be applied to a three-lock two-key 40 system. Furthermore, the transmission between the non-parallel grounding indicator shaft 30 and the rotating shaft of the shield 25 can be achieved through the cooperation of the second connecting rod 24 with the first limiting hole 2121 and the cooperation of the tongue 251 with the second limiting hole 241. This eliminates the need for costly transmission components such as universal joints, resulting in a simple structure and low cost.

[0052] In this embodiment, a square hole 231 is provided at the end of the first connecting rod 23. The square hole 231 is sleeved on the grounding indicator shaft 30 and fixed to the grounding indicator shaft 30. The program lock 22 can be an existing mechanical lock, including a lock body and a lock cylinder. The lock body is connected to the bracket assembly 21. After the key 40 is inserted into the lock cylinder, it can drive the lock cylinder to rotate relative to the lock body. Figure 5 As shown, the bracket assembly 21 includes a first bracket 211 and a second bracket 212. The first bracket 211 is fixed to the housing 11, and the program lock 22 is installed on the first bracket 211. The second bracket 212 is connected to the first bracket 211 and at least partially extends outside the first bracket 211. A first limiting hole 2121 is provided in the second bracket 212. With this configuration, the position of the first limiting hole 2121 can be adjusted by finely adjusting the position of the second bracket 212 relative to the first bracket 211, ensuring that the first limiting hole 2121 can accurately cooperate with the second connecting rod 24. In this embodiment, both the first bracket 211 and the second bracket 212 are sheet metal parts. The second bracket 212 is connected to the first bracket 211 by screws.

[0053] like Figure 5 and Figure 6As shown, the first limiting hole 2121 extends axially along a third direction, and its cross-section is an elongated strip extending along a second direction. The third direction is perpendicular to both the first and second directions. The second connecting rod 24 passes through the first limiting hole 2121 along the third direction and can move relative to the first limiting hole 2121 along the second direction. When the first connecting rod 23 rotates, the second connecting rod 24 generates a motion component along the second direction and a motion component along the third direction. By setting the first limiting hole 2121 to the above structure, the smooth movement and transmission of the second connecting rod 24 can be ensured. In this embodiment, the dimension of the first limiting hole 2121 in the first direction is the same as or slightly larger than the thickness of the second connecting rod 24 in the first direction, thereby providing support for the second connecting rod 24 while ensuring its smooth movement. In this embodiment, the cross-section of the first limiting hole 2121 is rectangular, which not only satisfies the above functions but also has a simple shape and is easy to process.

[0054] like Figure 5 and Figure 6 As shown, the second limiting hole 241 extends axially along the first direction, and its cross-section is rectangular. The length of this rectangle along the second direction is greater than the dimension of the tongue portion 251 in the second direction, and the dimension of this rectangle along the third direction is greater than the thickness of the tongue portion 251. The inner wall of the second limiting hole 241 is used to push the tongue portion 251 to rotate, so that the blocking member 25 switches between the position of blocking the program lock 22 and the position of exposing the program lock 22. On the one hand, since the second link 24 has a motion component along the second direction, while the tongue portion 251 can only rotate along the axis of the second direction, setting the length of the second limiting hole 241 along the second direction to be greater than the dimension of the tongue portion 251 in the second direction can avoid positional interference between the second link 24 and the tongue portion 251 in the second direction. On the other hand, the dimension of the second limiting hole 241 along the third direction is greater than the thickness of the tongue portion 251, allowing the tongue portion 251 to swing within the second limiting hole 241. When the second connecting rod 24 is displaced in the third direction, the upper and lower inner walls of the second limiting hole 241 cooperate with each other and push the tongue portion 251 to rotate around the pivot 220, thus allowing the entire blocking member 25 to swing along the pivot 220 to either block or expose the program lock 22. Figure 5 As shown, when the isolation device is in the grounded position, the left and upper side walls of the rectangular second limiting hole 241 limit the tongue 251, thereby allowing the shielding member 25 to remain in the position of exposing the program lock 22. Figure 6 As shown, when the isolation device is in the isolation closed position, the right side wall of the rectangular second limiting hole 241, together with the upper side wall and the right side wall, limits the tongue 251, thereby allowing the blocking member 25 to remain in the position of blocking the program lock 22.

[0055] like Figure 5 and Figure 6 As shown, the shielding member 25 also includes a connecting portion 252 and a shielding portion 253. The connecting portion 252 is rotatably engaged with the bracket assembly 21. The shielding portion 253 and the tongue portion 251 are respectively connected to the two ends of the connecting portion 252. The shielding portion 253 can cover the program lock 22 and the key 40 installed on the program lock 22. By setting the shielding portion 253 to cover the program lock 22 and the key 40, the shielding member 25 provides more reliable protection of the program lock 22, avoiding accidental operation. In this embodiment, the entire shielding member 25 is integrally bent from sheet metal, resulting in a simple structure and low cost.

[0056] In order to enable the program lock 22 to unlock the grounding operation hole 111, such as Figure 5 and Figure 6 As shown, the mechanical interlocking mechanism 20 also includes a locking plate 26, a sliding pin 27, and an operating baffle 28. The locking plate 26 is connected to the lock cylinder of the program lock 22 and can rotate synchronously with the key 40. The locking plate 26 is provided with a sliding groove 261. The sliding pin 27 is slidably engaged with the bracket assembly 21, with one end of the sliding pin 27 extending into and slidably engaging with the sliding groove 261. The operating baffle 28 is connected to the sliding pin 27 and is configured to block or avoid the grounding operating hole 111 of the isolation mechanism body 10. When the key 40 drives the lock cylinder to rotate, the locking plate 26 rotates synchronously. The groove wall of the sliding groove 261 on the locking plate 26 drives the sliding pin 27 to slide, and the sliding pin 27 drives the operating baffle 28 to move, thereby realizing the action of blocking or avoiding the grounding operating hole 111. The transmission is reliable and the structure is simple. In this embodiment, the cross-section of the sliding groove 261 is U-shaped, which is not only easy to process but also easy to install and engage with the sliding pin 27.

[0057] like Figure 5 and Figure 6 As shown, the mechanical interlocking mechanism 20 also includes a guide post 29, which is fixedly connected to the bracket assembly 21. A sliding pin 27 is sleeved on the guide post 29 and slides in cooperation with it. By setting the guide post 29, the movement of the sliding pin 27 can be guided, ensuring transmission accuracy and thus ensuring the positional accuracy of the operating baffle 28. In this embodiment, the first bracket 211 includes a side plate 2113 and two mounting plates 2114 that are vertically opposite each other. The program lock 22 is mounted on the side plate 2113, and both ends of the guide post 29 are fixedly connected to the two mounting plates 2114 respectively. The guide post 29 extends in a third direction.

[0058] like Figure 5 and Figure 6As shown, the bracket assembly 21 is provided with an elongated clearance hole 2111, which extends along the sliding direction of the sliding pin 27. The sliding pin 27 passes through the elongated clearance hole 2111 and is connected to the operating baffle 28. In this embodiment, the end of the sliding pin 27 that is axially away from the side plate 2113 engages with the locking piece 26, and the end that is axially close to the side plate 2113 passes through the elongated clearance hole 2111 and is connected to the operating baffle 28, thereby preventing interference between the movement of the operating baffle 28 and the movement of the locking piece 26. In this embodiment, the elongated clearance hole 2111 is formed on the side plate 2113 and extends along a third direction.

[0059] like Figure 5 and Figure 6 As shown, the bracket assembly 21 includes a mating part 2112, which is elongated and parallel to the movement direction of the sliding pin 27. The mechanical interlocking mechanism 20 also includes a sliding sleeve 210, which is connected to the operating baffle 28. The sliding sleeve 210 and the sliding pin 27 cooperate to guide the operating baffle 28 to move in a straight line. Specifically, the sliding sleeve 210 and the sliding pin 27 press against both sides of the mating part 2112, forming a slide. The operating baffle 28 is disposed in the slide. The cooperation of the three can guide the movement of the operating baffle 28 connected to the sliding sleeve 210 and the sliding pin 27, preventing the operating baffle 28 from rotating and ensuring the positional accuracy of the operating baffle 28 when it is in isolation or grounding engagement. In this embodiment, the mating part 2112 is part of the side plate 2113, which is formed by the area between the side wall of the clearance hole 2111 and the end face of the side plate 2113, and extends in a third direction. Optionally, the sliding sleeve 210 is mounted on the operating baffle 28 by a pin, and the sliding sleeve 210 can rotate relative to the pin, thereby reducing the frictional force when the sliding sleeve 210 and the mating part 2112 move relative to each other, and also reducing the wear of the parts.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. For those skilled in the art, based on the concept of this utility model, there will be changes in the specific implementation methods and application scope. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mechanical interlocking mechanism, mounted on an isolation mechanism body (10), the isolation mechanism body (10) including a rotatable grounding indicator shaft (30) extending along a first direction, characterized in that, The mechanical interlocking mechanism includes: A bracket assembly (21) is configured to be installed on the main body (10) of the isolation mechanism, and the bracket assembly (21) is provided with a first limiting hole (2121); A program lock (22), mounted on the bracket assembly (21), is used to engage with a key to lock or unlock the grounding operation hole (111) of the isolation mechanism body (10); A first link (23) and a second link (24), one end of the first link (23) is connected to the grounding indicator shaft (30), the first end of the second link (24) is pivotally connected to the other end of the first link (23), the second end of the second link (24) passes through the first limiting hole (2121) and can move relative to the first limiting hole (2121), and the second end is provided with a second limiting hole (241); The shield (25) is rotatably engaged with the bracket assembly (21) via a rotating shaft (220) extending in a second direction, which is not parallel to the first direction. The shield (25) is provided with a tongue (251), which is inserted into the second limiting hole (241) and can move relative to the second limiting hole (241). When the grounding indicator shaft (30) rotates to grounding position, it causes the shield (25) to shield the program lock (22). When it rotates to grounding position, it causes the shield (25) to expose the program lock (22).

2. The mechanical interlocking mechanism as described in claim 1, characterized in that, The first limiting hole (2121) extends axially along a third direction and has a cross-section that is an elongated strip extending along the second direction. The second connecting rod (24) passes through the first limiting hole (2121) along the third direction and can move relative to the first limiting hole (2121) along the second direction. The third direction is perpendicular to the first direction and the second direction, respectively.

3. The mechanical interlocking mechanism as described in claim 1, characterized in that, The second limiting hole (241) extends axially along the first direction. The cross-section of the second limiting hole (241) is rectangular. The dimension of the rectangle along the second direction is greater than the dimension of the tongue (251) in the second direction. The dimension of the rectangle along the third direction is greater than the thickness of the tongue (251). The inner wall of the second limiting hole (241) is used to push the tongue (251) to rotate so that the blocking member (25) switches between the position of blocking the program lock (22) and the position of exposing the program lock (22). The third direction is perpendicular to the first direction and the second direction, respectively.

4. The mechanical interlocking mechanism as described in claim 1, characterized in that, The shielding member (25) further includes a connecting part (252) and a shielding part (253). The connecting part (252) is rotatably engaged with the bracket assembly (21). The shielding part (253) and the tongue part (251) are respectively connected to the two ends of the connecting part (252). The shielding part (253) can cover the program lock (22) and the key installed on the program lock (22).

5. The mechanical interlocking mechanism as described in claim 1, characterized in that, The support assembly (21) includes: The first bracket (211) is installed on the main body (10) of the isolation mechanism, and the program lock (22) is installed on the first bracket (211); The second bracket (212) is connected to the first bracket (211) and extends at least partially outside the first bracket (211), and the first limiting hole (2121) is provided in the second bracket (212).

6. The mechanical interlocking mechanism as described in any one of claims 1-5, characterized in that, The mechanical interlocking mechanism also includes: A locking plate (26) is connected to the program lock (22) and configured to be driven to rotate by the key. The locking plate (26) is provided with a sliding groove (261). A sliding pin (27) is slidably engaged with the bracket assembly (21), with one end of the sliding pin (27) extending into the slide groove (261) and slidably engaged with the slide groove (261); An operating baffle (28) is connected to the sliding pin (27), and the operating baffle (28) is configured to block or avoid the grounding operating hole (111) of the isolation mechanism body (10).

7. The mechanical interlocking mechanism as described in claim 6, characterized in that, The mechanical interlocking mechanism also includes a guide post (29), which is fixedly connected to the bracket assembly (21), and the sliding pin (27) is sleeved on the guide post (29) and slides in cooperation with the guide post (29).

8. The mechanical interlocking mechanism as described in claim 6, characterized in that, The bracket assembly (21) is provided with an obstacle clearance hole (2111), which extends along the sliding direction of the sliding pin (27). The sliding pin (27) passes through the obstacle clearance hole (2111) and is connected to the operating baffle (28).

9. The mechanical interlocking mechanism as described in claim 8, characterized in that, The bracket assembly (21) includes a mating part (2112), which is constructed as an elongated strip parallel to the movement direction of the sliding pin (27). The mechanical interlocking mechanism also includes a sliding sleeve (210), which is connected to the operating baffle (28). The sliding sleeve (210) and the sliding pin (27) cooperate to guide the operating baffle (28) to move in a straight line.

10. An isolation device, characterized in that, The device includes an isolation mechanism body (10) and a mechanical interlocking mechanism as described in any one of claims 1-9. The isolation mechanism body (10) includes a housing (11) and a grounding indicator shaft (30). The grounding indicator shaft (30) is rotatable relative to the housing (11) and is used to indicate the grounding status of the isolation mechanism body (10). The bracket assembly (21) is mounted on the housing (11), and the grounding operation hole (111) is provided on the housing (11).

Images