Switch cabinet rear door interlocking device

Abstract

The utility model discloses a switch cabinet back door interlocking device, which comprises a driving connecting rod, a lock bolt and a linkage plate which are movably arranged, two ends of the linkage plate are respectively connected with the driving connecting rod and the lock bolt, one end of the driving connecting rod is provided with an abutting part used for abutting against the back door in the closing direction, and when the back door is closed, the driving connecting rod is connected with the lock bolt. The lock bolt abuts against the rear door and locks opening of the rear door. According to the door bolt structure arranged at the rear door, a locking mode of the door bolt composed of the lock bolt and the driving connecting rod is adopted, a traditional lock hook mode is replaced, the space structure is optimized, meanwhile, the meshing space of the lock bolt and the rear door is greatly increased, the locking strength of the rear door is ensured, and risks caused by failure are avoided; effective linkage is formed between the actions of the lock bolt and the driving connecting rod and the rear door, synchronous locking of the lock bolt on the rear door can be achieved through the closing action of the rear door, and convenience of assembly operation is also optimized through optimization of the action structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinets and relates to a rear door interlocking device of a switch cabinet. Background Art

[0002] The interlocking of the grounding switch in the switch cabinet is an important part of the switch cabinet. When the grounding switch in the cabinet is opened, the cabinet rear door is not allowed to be opened. When the cabinet rear door is opened, the grounding switch in the cabinet is not allowed to be closed. All these are to prevent operators from mistakenly entering the live interval, so as to achieve the design of "preventing mistaken entry into the live interval" in the five protection requirements of the switch cabinet. Therefore, a rear door interlocking device is set in the interlocking component of the grounding switch of the switch cabinet. The mainstream method of the existing rear door interlocking is to install a round steel hook and a square steel lock on the rear door. The internal modules are mostly cast lock hooks, which are costly. Due to the limitation of the structural space, the engagement space of the lock hook connection is small, and there is a risk of failure. At the same time, in order to reduce the cabinet matching margin, modular holes are often used to adjust the matching gap, which makes the assembly operation cumbersome. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a switch cabinet rear door interlocking device.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A switch cabinet rear door interlocking device includes a movably arranged driving link, a lock bolt and a linkage plate, wherein the two ends of the linkage plate are respectively connected to the driving link and the lock bolt, and one end of the driving link forms an abutment portion for abutting against the rear door in a closing direction. When the rear door is closed, the lock bolt abuts against the rear door and locks the rear door from opening.

[0006] Furthermore, a lock plate is provided on the rear door, and a locking hole for the lock bolt to pass through is opened on the lock plate.

[0007] Furthermore, it also includes a fixing plate, the driving connecting rod is inserted through the fixing plate along the first direction, the abutting portion is located at one end of the driving connecting rod along the first direction, and the locking bolt is inserted through the fixing plate along the second direction.

[0008] Furthermore, the linkage plate is hinged to the fixed plate, and the linkage plate is respectively provided with a first slide groove and a second slide groove, the driving connecting rod is provided with a first slide shaft for passing through the first slide groove, and the locking bolt is provided with a second slide shaft for passing through the second slide groove.

[0009] Furthermore, it also includes a return spring, wherein two ends of the return spring are respectively connected to the fixed plate and the driving connecting rod, and the return spring provides a pulling force to the driving connecting rod toward the rear door.

[0010] Furthermore, it also includes a crank arm device, which includes a limit link, a crank arm, a limit shaft and a fixed seat, the limit link is connected to the driving link, a limit block is arranged at one end of the limit link, the limit shaft is passed through the fixed seat, the crank arm is connected to the circumferential side of the limit shaft, and the limit block is against the limit shaft in a first direction.

[0011] Furthermore, a flange is provided on the limiting rotating shaft along the circumferential direction, and a limiting notch is provided on the flange for the limiting block to enter along the first direction.

[0012] In summary, the utility model is beneficial in that:

[0013] The door bolt structure arranged at the rear door of the utility model adopts a locking form of the door bolt composed of a lock bolt and a driving connecting rod, replacing the traditional lock hook type. While optimizing the spatial structure, it greatly increases the bite space between the lock bolt and the rear door, ensuring the locking strength of the rear door and avoiding the risk of failure; the actions of the lock bolt and the driving connecting rod are effectively linked with the rear door, and the closing action of the rear door can realize the synchronous locking of the rear door by the lock bolt, and the optimization of the action structure also optimizes the convenience of assembly operation; the door bolt structure and the crank arm device arranged at the grounding switch are connected by a limit connecting rod to realize the transmission of the action, the action of opening / closing the rear door is transmitted to the crank arm device to lock / unlock the grounding switch, and the action of closing / opening the grounding switch is transmitted to the door bolt structure to unlock / lock the rear door, so as to prevent the operator from mistakenly entering the energized interval to meet the five protection requirements; the transmission mode of the driving connecting rod and the limit connecting rod is simple and reliable, and the rear door switch action and the action of the crank arm are effectively linked. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the interlocking device of the utility model.

[0015] Figure 2 for Figure 1 Structural diagram of the middle door bolt structure.

[0016] Figure 3 for Figure 2 Side elevation view of the .

[0017] Figure 4 for Figure 1 Schematic diagram of the structure when the center rear door is closed.

[0018] Figure 5 for Figure 4 Schematic diagram of the structure of the crank arm device.

[0019] Markings in the figure: 1. Bolt structure; 11. Fixed plate; 12. Driving connecting rod; 13. Lock bolt; 14. Linkage plate; 15. Return spring; 2. Crank arm device; 21. Crank arm; 22. Fixed seat; 23. Limiting shaft; 24. Flange; 25. Limiting notch; 3. Limiting connecting rod; 31. Limiting block; 4. Rear door; 41. Lock plate; 42. Locking hole. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] The utility model provides a switch cabinet rear door interlocking device, which is used for safety linkage between the opening and closing states of the grounding switch of the switch cabinet and the opening and closing states of the rear door, so as to at least realize the requirements that the rear door can be opened when the grounding switch is in the closing state and the grounding switch can be opened when the rear door is in the closing state.

[0025] Specifically, refer to Figure 1 The interlocking device includes a bolt structure 1 and a crank arm device 2, wherein the bolt structure 1 is arranged on a side close to the rear door 4, and the crank arm device 2 is arranged on a side close to the grounding switch, and the bolt structure 1 and the crank arm device 2 are connected by a limiting link 3 to achieve linkage.

[0026] Reference Figure 2 and Figure 3 The bolt structure 1 includes a fixed plate 11, a lock bolt 13, a driving link 12, a linkage plate 14 and a return spring 15. The fixed plate 11 is fixedly connected to the inside of the switch cabinet. The driving link 12 is penetrated through the fixed plate 11 along a first direction. One end of the driving link 12 along the first direction is arranged toward the rear door 4, and when the rear door 4 is in a closing action, the rear door 4 can resist the driving link 12 and push the driving link 12 to move along the first direction. Furthermore, the two ends of the return spring 15 are respectively connected to the fixed plate 11 and the driving link 12 to pull the driving link 12 along the first direction, so that the driving link 12 is maintained at a set position when not subjected to other external forces. The driving link 12 in the set position will resist the rear door 4 during the closing action of the rear door 4.

[0027] The locking bolt 13 is penetrated on the fixed plate 11 along the second direction, the linkage plate 14 is hinged to the fixed plate 11, and the two ends of the linkage plate 14 are movably connected to the driving link and the locking bolt respectively. Specifically, the linkage plate 14 is respectively provided with a first sliding groove and a second sliding groove in two different radial directions of the hinge axis position, the driving link is provided with a first sliding shaft, the first sliding shaft is penetrated in the first sliding groove, and can slide within the range of the first sliding groove, the locking bolt is provided with a second sliding shaft, the second sliding shaft is penetrated in the second sliding groove, and can slide within the range of the second sliding groove, so when the driving link 12 moves in the first direction, the locking bolt 13 can be driven to move in the second direction through the transmission of the linkage plate 14.

[0028] The rear door 4 is provided with a lock plate 41, and a through locking hole 42 is opened on the lock plate 41. When the rear door 4 is in the closing action, the rear door 4 pushes the driving connecting rod 12 to move along one end of the first direction, thereby driving the lock bolt 13 to move along one end of the second direction. When the rear door 4 moves to the fully closed process, the lock bolt 13 passes through the locking hole 42 along the second direction. At this time, in the opening and closing direction of the rear door 4, the lock bolt 13 will resist the lock plate 41.

[0029] Reference Figure 4 and Figure 5 The crank arm device 2 includes a crank arm 21, one end of which is connected to the grounding switch, and the other end of the crank arm 21 is provided with a limit shaft 23. A fixed seat 22 is fixedly arranged in the switch cabinet, and the limit shaft 23 is penetrated by the fixed seat 22 and can rotate relative to the fixed seat 22. The closing and opening actions of the grounding switch are driven by the crank arm 21 to drive the limit shaft 23 to rotate within a certain angle range.

[0030] One end of the limit link 3 is connected to the driving link 12, and the other end is movably connected to the fixing seat 22. When the driving link 12 moves along the first direction, it can synchronously drive the limit link 3 to move along the first direction; a limit block 31 is also provided on the other end of the limit link 3, and the limit block 31 can also move along the first direction driven by the limit link 3. Further, a flange 24 is provided around the outer periphery of the limit shaft 23, and a limit notch 25 is provided at one of the circumferential positions of the flange 24. The limit notch 25 rotates and changes its position under the rotation of the limit shaft 23. In this embodiment, The limiting notch 25 includes a locking position and an unlocking position during rotation. In the locking position, the limiting notch 25 is located on the moving path of the limiting block 31. When the limiting link 3 and the driving link 12 move along the first direction toward the side of the rear door 4, the limiting block 31 will enter the limiting notch 25 and abut against the inner wall of the limiting notch 25 in the circumferential direction of the limiting shaft 23, so that the limiting shaft 23 cannot rotate; in the unlocking position, the limiting notch 25 is misaligned with the moving path of the limiting block 31, so that the limiting block 31 abuts against the flange 24 and cannot further move along the first direction toward the side of the rear door 4.

[0031] In this embodiment, taking the initial position of the interlocking device as an example, in the initial position, the rear door 4 is in an open state, the front end of the driving connecting rod 12 extends toward the rear door 4 relative to the fixed plate 11 along a first direction, the grounding switch is in a closed state, and the limit block 31 is engaged in the limit notch 25. At this time, the limit shaft 23 cannot rotate due to the restriction of the limit block 31, and thus in this initial position, the safety operation requirement that the grounding switch cannot be closed when the rear door 4 is open is achieved.

[0032] Furthermore, when the rear door 4 is closed in the above-mentioned initial position, the rear door 4 is abutted against the driving link 12 and pushes it to move backward in the first direction, and the movement of the driving link 12 drives the lock bolt 13 to move upward in the second direction through the linkage plate 14. When the rear door 4 is closed in place, the lock bolt 13 passes upward through the locking hole 42 of the lock plate 41, and synchronously, the driving link 12 drives the limit link 3 to move backward, and the limit block 31 disengages from the limit notch 25 backward and no longer restricts the limit shaft 23, so that the crank arm 21 can rotate at this time, so that the grounding switch can be closed, thereby achieving the safety operation requirement that the grounding switch can be closed only when the rear door 4 is closed.

[0033] Furthermore, when the rear door 4 is closed, the limit shaft 23 rotates at any position other than the locking position of the limit notch 25 (i.e., the grounding switch is in any position other than the closing position), and the limit block 31 remains against the flange 24 and cannot move forward in the first direction, so that the limit link 3 and the drive link 12 cannot move and reset toward the rear door 4 in the first direction under the action of the reset spring 15, and at this time, the lock bolt 13 remains inserted into the locking hole 42, and the lock plate 4 1 is restricted by the lock bolt 13 so that the rear door 4 cannot be opened, realizing the safety operation requirement that the rear door 4 cannot be opened when the grounding switch is opened; further, the grounding switch is rotated to the closed position, so that the limit block 31 can move along the first direction into the limit gap 25, and then at this time the limit link 3 and the drive link 12 can be driven by the reset spring 15 to move forward, so that the linkage plate 14 drives the lock bolt 13 downward to disengage from the locking hole 42, and at this time the rear door 4 can be opened, realizing the safety operation requirement that the rear door 4 can be opened only after the grounding switch is closed.

[0034] 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 rear door interlocking device, characterized in that: The invention comprises a movably arranged driving link (12), a locking bolt (13) and a linkage plate (14); the two ends of the linkage plate (14) are respectively connected to the driving link (12) and the locking bolt (13); one end of the driving link (12) forms an abutting portion for abutting against the rear door (4) in the closing direction; when the rear door (4) is closed, the locking bolt (13) abuts against the rear door (4) and locks the rear door (4) from being opened.

2. A switch cabinet rear door interlocking device according to claim 1, characterized in that: The rear door (4) is provided with a lock plate (41), and the lock plate (41) is provided with a locking hole (42) for the lock bolt (13) to pass through.

3. A switch cabinet rear door interlocking device according to claim 1, characterized in that: It also includes a fixing plate (11), the driving connecting rod (12) is inserted through the fixing plate (11) along a first direction, the abutting portion is located at one end of the driving connecting rod (12) along the first direction, and the locking bolt (13) is inserted through the fixing plate (11) along a second direction.

4. A switch cabinet rear door interlocking device according to claim 3, characterized in that: The linkage plate (14) is hinged to the fixed plate (11), and a first sliding groove and a second sliding groove are respectively provided on the linkage plate (14), a first sliding shaft for passing through the first sliding groove is provided on the driving connecting rod (12), and a second sliding shaft for passing through the second sliding groove is provided on the locking bolt (13).

5. A switch cabinet rear door interlocking device according to claim 3, characterized in that: It also includes a return spring (15), the two ends of which are respectively connected to the fixed plate (11) and the driving connecting rod (12), and the return spring (15) provides a pulling force to the driving connecting rod (12) toward the rear door (4).

6. A switch cabinet rear door interlocking device according to claim 1, characterized in that: The invention also comprises a crank arm device (2), wherein the crank arm device (2) comprises a limit connecting rod (3), a crank arm (21), a limit rotating shaft (23) and a fixed seat (22), wherein the limit connecting rod (3) is connected to the driving connecting rod (12), a limit block (31) is arranged at one end of the limit connecting rod (3), the limit rotating shaft (23) is passed through the fixed seat (22), the crank arm (21) is connected to the peripheral side of the limit rotating shaft (23), and the limit block (31) abuts against the limit rotating shaft (23) in a first direction.

7. A switch cabinet rear door interlocking device according to claim 6, characterized in that: A flange (24) is provided on the limiting rotating shaft (23) along the circumferential direction, and a limiting notch (25) is provided on the flange (24) for the limiting block (31) to enter along the first direction.

Images