CN118367476B - Interlocking mechanism and low-voltage switch cabinet - Google Patents

Abstract

The invention discloses an interlocking mechanism and a low-voltage switch cabinet, which relate to the field of electrical equipment and comprise a cabinet body and a drawer box arranged on the cabinet body, wherein the drawer box is provided with an inserting position and a pulling-out position on the cabinet body, the cabinet body and the drawer box are connected through a self-locking mechanism, and the self-locking mechanism comprises: the lock catch assembly comprises a shaft rod unit which is rotatably arranged on the drawer box, and a clamping block unit is arranged on the shaft rod unit; the locking assembly comprises a first locking column unit which is automatically locked with the locking assembly at the pull-out position of the drawer box and a second locking column unit which is automatically locked with the locking assembly at the insertion position of the drawer box.

Description

Interlocking mechanism and low voltage switch cabinet

Technical Field

The invention relates to the technical field of electrical equipment, in particular to an interlocking mechanism and a low-voltage switch cabinet.

Background Art

Low-voltage switchgear is mainly used in the low-voltage distribution part of the power system. Its function is to reasonably configure the power supply. Among them, the drawer-type low-voltage switchgear is a common type of switchgear. It is mainly composed of certain electrical components according to a certain circuit plan to form several functional units. Each functional unit is installed on the cabinet body in a drawer-like structure that can be pulled out. When the corresponding drawer unit is pulled out, the drawer unit is separated from the corresponding electrical plug-in part on the cabinet body, and the unit is in a disconnected state, which is convenient for subsequent maintenance work.

The existing Chinese patent publication number is: CN115579774B, and the name of the patent is "A low-voltage drawer-type switch cabinet". The patent includes "including a cabinet shell, a vibration mechanism is fixedly connected to the top of the cabinet shell, a dust cover is provided on the outer surface of the vibration mechanism, a dust collecting mechanism is slidably connected to the groove on the lower surface of the dust cover, a sliding groove is provided on the inner wall of the cabinet shell, a pull-out drawer is slidably connected to the inside of the sliding groove, an air duct is fixedly connected to the inside of the cabinet shell, the outer surface of the air duct passes through the cabinet shell and extends to the outside, a fan is fixedly connected to the top of the air duct, and a heat conduction device is fixedly connected to the outer surface of the air duct to achieve the purpose of heat dissipation inside the cabinet."

A corresponding interlocking mechanism is usually provided between the cabinet body and the drawer unit of the existing drawer-type low-voltage switchgear, so as to realize the limiting and locking between the drawer unit and the cabinet body at different positions. However, the disadvantage of the existing interlocking mechanism is that it can only limit the drawer unit from leaving the cabinet body at the end position of its moving stroke, and the operator needs to further manually operate independently to realize the locking of the drawer unit at this position. It does not have an automatic locking effect, and it is easy for the operator to forget to manually lock the drawer unit by mistake, which poses a safety hazard.

Summary of the invention

The object of the present invention is to provide an interlocking mechanism and a low-voltage switch cabinet to solve the deficiencies in the above-mentioned prior art.

In order to achieve the above object, the present invention provides the following technical solutions:

An interlocking mechanism includes a cabinet and a drawer box installed on the cabinet, wherein the drawer box has an insertion position and a pull-out position on the cabinet, and the cabinet and the drawer box are connected via a self-locking mechanism, wherein the self-locking mechanism includes:

A lock assembly, comprising a shaft unit rotatably mounted on the drawer box, wherein a block unit is provided on the shaft unit;

The locking assembly comprises a first locking column unit which is automatically locked with the locking assembly at a drawer box pull-out position, and a second locking column unit which is automatically locked with the locking assembly at a drawer box insert position.

Preferably, the axis line of the shaft unit is parallel to the trajectory line of the drawer box, the shaft unit has a pushing force to move toward the insertion position when the drawer box is pushed in, and the shaft unit has a pulling force to move toward the pull-out position when the drawer box is pulled out.

Preferably, the card block unit includes a plate body, and the plate body is provided with a linkage component and a card limit component, and the card limit component has a locked state locked with the locking component and an unlocked state capable of being separated from the locking component.

Preferably, the shaft rod unit includes a rod column body, a track groove is provided on the column surface of the rod column body, a sliding column fixed to the cabinet body is adapted for sliding engagement in the groove body of the track groove, and the shaft rod unit can also undergo corresponding axial deflection while moving in the axial direction.

Preferably, the first locking column unit and the second locking column unit are of the same structure, both comprising a column, on which a protruding piece cooperating with the locking assembly is mounted.

Preferably, a supporting plate is fixed in the cabinet, a recessed groove for the shaft unit to pass through is formed on the supporting plate, and the first locking column unit is installed at a position on the supporting plate corresponding to a moving trajectory of the block unit.

Preferably, the linkage assembly includes an installation opening opened on the plate body, in which a columnar block fixed to the rod column body is adapted to be inserted, and a bar wheel engagement mechanism is provided on both sides of the columnar block, and the bar wheel engagement mechanism is driven by the columnar block to control the state switching of the card limit assembly.

Preferably, the clamping assembly includes an insertion opening formed in the plate body, a retaining bar is movably installed in the insertion opening, and a notch portion is formed on the retaining bar for the protruding member to pass through.

Preferably, a long cavity is provided on the wall surface of the insertion port, a connecting port communicating with the installation port is provided on the cavity wall of the long cavity, and the long cavity is plugged and matched with the baffle.

Preferably, the above-mentioned interlocking mechanism is provided on the low-voltage switch cabinet.

In the above technical scheme, an interlocking mechanism provided by the present invention, by setting a lock assembly and a locking assembly, can enable the drawer box to automatically lock when it reaches the end position of its moving stroke, without the need for further manual operation to lock it, which is beneficial to avoid the operator's negligence and forgetting to manually lock the drawer unit, reduces the safety hazards during maintenance of the cabinet, and improves the overall comprehensive safety of the distribution cabinet.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

FIG1 is a schematic diagram of a self-locking mechanism of an interlocking mechanism of the present invention at the bottom of a drawer box;

FIG2 is a schematic diagram of the installation of a supporting plate of an interlocking mechanism of the present invention in a cabinet;

FIG3 is a schematic diagram of a drawer box of an interlocking mechanism of the present invention in a pulled-out position on a cabinet;

FIG4 is a schematic structural diagram of a card block unit of an interlocking mechanism of the present invention;

FIG5 is a schematic diagram of a cross-sectional view of a column of an interlocking mechanism of the present invention;

FIG6 is a schematic diagram of a block unit of an interlocking mechanism of the present invention in an upright state;

FIG7 is a schematic diagram of a block unit of an interlocking mechanism of the present invention in an inverted state;

FIG. 8 is a schematic diagram of a gear bar of an interlocking mechanism of the present invention.

Description of reference numerals:

1. Cabinet; 1.1. Support plate; 1.2. Concave groove; 2. Drawer box; 3. Lock assembly; 4. Axis rod unit; 4.1. Rod column; 4.2. Track groove; 4.21. Spiral groove; 4.22. First linear groove; 4.23. Second linear groove; 4.3. Sliding column; 5. Block unit; 5.1. Plate body; 5.2. Linkage assembly; 5.21. Mounting port; 5.22. Columnar block; 5.3. Limit assembly; 5.31. Insertion port; 5.32. Stop bar; 5.33. Notch; 5.34. Long cavity; 5.35. Connector Interface; 5.36, slope portion; 5.4, support rod; 6, locking assembly; 6.1, first lock column unit; 6.2, second lock column unit; 7, column; 8, protruding piece; 8.1, prismatic rod; 8.2, inclined portion; 8.3, plug-in blind hole; 8.4, spring; 9, gear meshing mechanism; 9.1, rack; 9.2, tooth meshing unit; 9.21, shaft rod; 9.22, gear; 9.23, bevel gear; 9.24, slide groove; 9.25, slide block; 9.26, tooth portion; 10, handle piece; 11, stopper; 12, slot.

DETAILED DESCRIPTION

In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1-8 , an interlocking mechanism provided by an embodiment of the present invention includes a cabinet 1 and a drawer box 2 mounted on the cabinet 1 , wherein the drawer box 2 has an insertion position and a pull-out position on the cabinet 1 , and the cabinet 1 and the drawer box 2 are connected via a self-locking mechanism, and the self-locking mechanism includes:

The lock assembly 3 includes a shaft unit 4 rotatably mounted on the drawer box 2, and a block unit 5 is provided on the shaft unit 4;

The locking assembly 6 comprises a first locking column unit 6.1 which is automatically locked with the locking assembly 3 when the drawer box 2 is pulled out, and a second locking column unit 6.2 which is automatically locked with the locking assembly 3 when the drawer box 2 is inserted;

Specifically, the first lock column unit 6.1 and the second lock column unit 6.2 are both fixed to the cabinet body 1, and the lock component 3 can move synchronously with the drawer box 2. In actual use, for example, when the drawer box 2 is pulled outward from the cabinet body 1 to the pulled-out position, the block unit 5 on the lock component 3 is engaged with the corresponding first lock column unit 6.1, thereby automatically limiting the push-pull movement of the drawer box 2. Similarly, when the drawer box 2 is pushed inward from the cabinet body 1 to the inserted position, the block unit 5 on the lock component 3 is engaged with the corresponding second lock column unit 6.2, thereby automatically limiting the push-pull movement of the drawer box 2. Under the action of the lock component 6, the drawer box can be automatically locked when it reaches the end position of its moving stroke, thereby eliminating the need for further manual operation to lock it, which is beneficial to avoid the situation where the operator neglects to manually lock the drawer unit, reduces the safety hazard during cabinet maintenance, and improves the overall comprehensive safety of the power distribution cabinet.

In another embodiment provided by the present invention, the axis line of the shaft unit 4 is parallel to the trajectory line of the drawer box 2, and the shaft unit 4 has a pushing force to move toward the insertion position when the drawer box 2 is pushed in, and has a pulling force to move toward the pull-out position when the drawer box 2 is pulled out;

The shaft unit 4 includes a rod column 4.1, a track groove 4.2 is provided on the cylindrical surface of the rod column 4.1, a sliding column 4.3 fixed to the cabinet 1 is adapted and slidably connected in the groove body of the track groove 4.2, and the shaft unit 4 can also undergo corresponding axial deflection while moving in the axial direction, the track groove 4.2 includes a spiral groove 4.21, the number of spiral turns of the spiral groove 4.21 can be selected as three quarters of a circle or two thirds of a circle, the starting angle of the spiral line of the spiral groove 4.21 can be selected as 50 degrees, 60 degrees, or 71 degrees, and the two ends of the groove line of the spiral groove 4.21 are respectively connected with a first straight groove 4.22 and a second straight groove 4.23, and the first straight groove 4.22 and the second straight groove 4.23 are parallel to the axis of the rod column 4.1;

Furthermore, both ends of the rod column 4.1 extend out of the two ends of the drawer box 2, and a handle 10 is rotatably mounted on one end of the rod column 4.1 close to the extended end of the drawer box 2;

In actual use, when the drawer box 2 needs to be pushed into the insertion position, the user applies a force to the handle 10 to push the drawer box 2 into the cabinet 1. At this time, the rod column 4.1 has a pushing force to move toward the insertion position. Since the rod column 4.1 is rotatably installed on the drawer box 2, the drawer box 2 moves synchronously with the rod column 4.1 toward the insertion position. During this movement, the rod column 4.1 rotates axially under the action of the track groove 4.2 and the slide column 4.3, thereby driving the block unit 5 to flip during the movement of the drawer box 2.

In other words, when the card block unit 5 has two states, namely, the upright state when in the pulled-out position and the inverted state at the inserted position, only when the card block unit 5 is in the upright state can the card block unit 5 automatically lock with the first lock column unit 6.1 at the pulled-out position. Similarly, only when the card block unit 5 is in the inverted state can the card block unit 5 automatically lock with the second lock column unit 6.2 at the inserted position. Therefore, by setting the track groove 4.2 and the slide column 4.3, the state switching of the card block unit 5 is achieved during the movement of the drawer box 2 between the inserted position and the pulled-out position, so that the card block unit 5 is in the upright state when docking with the first lock column unit 6.1, and is in the inverted state when docking with the second lock column unit 6.2.

In another embodiment provided by the present invention, the card block unit 5 includes a plate body 5.1, on which a linkage component 5.2 and a card limit component 5.3 are provided, and a plurality of supporting rods 5.4 are fixedly passed through the plate surface of the plate body 5.1, and the card limit component 5.3 has a locked state in which it is locked with the card lock component 6, and also has an unlocked state in which it can be separated from the card lock component 6;

Furthermore, the linkage component 5.2 includes a mounting opening 5.21 provided on the plate body 5.1, a columnar block 5.22 fixed to the rod column body 4.1 is adapted to be inserted in the mounting opening 5.21, the axis of the columnar block 5.22 coincides with the axis of the rod column body 4.1, the cross section of the columnar block 5.22 is rectangular, and blocks 11 located on both sides of the plate body 5.1 are fixed on the column of the columnar block 5.22, thereby limiting the displacement range of the plate body 5.1 in the length direction of the columnar block 5.22, further, a card slot 12 adapted to the columnar block 5.22 is provided on the mounting opening 5.21, thereby limiting the lateral movement of the columnar block 5.22 in the mounting opening 5.21, and a bar wheel meshing mechanism 9 is provided on both sides of the columnar block 5.22, and the bar wheel meshing mechanism 9 is driven by the columnar block 5.22 to control the state switching of the card limiting component 5.3;

The card limiting component 5.3 includes an insertion opening 5.31 opened in the plate body 5.1, and a blocking bar 5.32 is movably installed in the insertion opening 5.31. One side of the blocking bar 5.32 is a slope portion 5.36. The bottom end of the slope portion 5.36 is located at the end of the blocking bar 5.32. The slope portion 5.36 can make sliding contact with the protruding member 8. The blocking bar 5.32 is provided with a notch portion 5.33 for the protruding member 8 to pass through. The card limiting component 5.3 has two states, namely a blocking position and an avoidance position. When the notch portion 5.33 is located at the protruding member 8, the notch portion 5.33 is located at the protruding member 8. 8, at this time, the protruding member 8 can pass through the notch 5.33 and cross the stop bar 5.32. At this time, the card limit assembly 5.3 is in the avoidance position, and the docking between the card block unit 5 and the card lock assembly 6 does not have a locking effect. Similarly, when the notch 5.33 deviates from the moving trajectory of the protruding member 8, the protruding member 8 is blocked and limited by the stop bar 5.32. At this time, the card limit assembly 5.3 is in the blocking position. At this time, the docking between the card block unit 5 and the card lock assembly 6 has a locking effect, and the drawer box 2 can be limited at this position.

In actual use, the columnar block 5.22 and the rod column 4.1 always move synchronously in the same direction. For example, when the drawer box 2 moves from the pulled-out position to the inserted position, when the drawer box 2 is close to the inserted position, the card block unit 5 is in an inverted state. As the drawer box 2 continues to move forward, the corresponding second lock column unit 6.2 has extended into the insertion opening 5.31. At this time, the card limit component 5.3 is still in the avoidance position, and the end of the support rod 5.4 contacts the wall of the back side of the cabinet 1. As the drawer box 2 is further moved, Continue to push forward, that is, the rod column 4.1 is further pushed toward the insertion position. At this time, under the support of the support rod 5.4, the plate body 5.1 no longer moves toward the insertion position, and the columnar block 5.22 still moves toward the insertion position. At this time, the plate body 5.1 and the columnar block 5.22 move toward each other, that is, the distance between the rod column 4.1 and the plate body 5.1 is shortened. At this time, the card limit component 5.3 is switched from the avoidance position to the blocking position under the action of the sprocket meshing mechanism 9;

Similarly, when the drawer box 2 moves from the insertion position to the pull-out position, under the action of the rod column 4.1 pulling outward, the column block 5.22 has a force toward the pull-out position. Since the limit assembly 5.3 is in the blocking position, the plate body 5.1 cannot move toward the pull-out position. However, as the column block 5.22 moves toward the pull-out position, under the transmission action of the bar wheel engagement mechanism 9, the limit assembly 5.3 switches from the blocking position to the avoidance position, thereby releasing the drawer box 2 from being limited at this position, and the drawer box 2 can move toward the pull-out position.

In another embodiment provided by the present invention, the first lock column unit 6.1 and the second lock column unit 6.2 have the same structure and both include a column 7, on which a protrusion 8 is installed to cooperate with the limiting assembly 5.3. Specifically, the axis of the column 7 after installation is parallel to the horizontal plane, and the protrusion 8 can be optionally a prism rod 8.1 on the side of the column 7. Further, the axis of the prism rod 8.1 is perpendicular to the axis of the column 7. When the prism rod 8.1 corresponds to the bar body of the baffle 5.32, the limiting assembly 5.3 is in a blocking position, and when the prism rod 8.1 corresponds to the notch 5.33 of the baffle 5.32, the limiting assembly 5.3 is in an avoidance position.

In another embodiment provided by the present invention, a sloped portion 8.2 is provided at the extended end of the prism rod 8.1, and a plugging blind hole 8.3 for the prism rod 8.1 to be plugged in is provided on the side of the column 7, and the plugging blind hole 8.3 is connected to the prism rod 8.1 by a spring 8.4. In a normal state, the lower edge of the sloped portion 8.2 is flush with the opening of the plugging blind hole 8.3, and the sloped portion 8.2 can be squeezed by the stop bar 5.32 so that the prism rod 8.1 is completely retracted into the plugging blind hole 8.3, and the sloped portion 8.2 is always tilted in the direction of movement toward the drawer box 2;

In actual use, as the drawer box 2 approaches the inclined surface 8.2, when the inclined surface 8.2 is squeezed and pushed by the stop bar 5.32, the prism rod 8.1 is completely retracted into the plug-in blind hole 8.3, so that when the stop bar 5.32 passes over the prism rod 8.1, the prism rod 8.1 is restored to the initial extended state under the action of the spring 8.4, and the stop bar 5.32 can no longer generate a force on the inclined surface 8.2 of the prism rod 8.1, so that the card limit component 5.3 at the blocking position can be limited;

That is to say, when the locking unit 6 is docked with the limiting assembly 5.3, no matter the limiting assembly 5.3 is in the blocking position or the avoiding position, the locking unit 6 can pass through the insertion opening 5.1 without affecting the normal movement of the plate body 5.1 toward the insertion position.

In another embodiment provided by the present invention, a supporting plate 1.1 is fixed in the cabinet 1, the board surface of the supporting plate 1.1 is perpendicular to the horizontal plane, the board surface of the supporting plate 1.1 is parallel to the back side of the cabinet, and a recessed groove 1.2 for the shaft rod unit 4 to pass through is provided on the supporting plate 1.1, and the first locking column unit 6.1 is installed at a position corresponding to the moving trajectory line of the supporting plate 1.1 and the block unit 5, specifically, the first locking column unit 6.1 is installed at a position corresponding to the moving trajectory line of the supporting plate 1.1 and the block unit 5 when they are in an upright state, so as to facilitate the connection with the block unit 5 in the upright state, and the second locking column unit 6.3 is located at a position corresponding to the moving trajectory line when the block unit 5 is in an inverted state.

In another embodiment provided by the present invention, a long cavity 5.34 is provided on the wall of the insertion port 5.31, a connecting port 5.35 communicating with the installation port 5.21 is provided on the cavity wall of the long cavity 5.34, the long cavity 5.34 is plugged and matched with the baffle 5.32, the bar wheel engagement mechanism 9 includes a rack 9.1 located in the long cavity 5.34, one end of the rack 9.1 is fixed to the baffle 5.32, the bar wheel engagement mechanism 9 also includes tooth meshing units 9.2 rotationally symmetrically distributed on both sides of the columnar block 5.22, the two tooth meshing units 9.2 are respectively a first tooth meshing unit and a second tooth meshing unit, the tooth meshing unit 9.2 includes an end portion of a shaft rod 9.21 extending into the long cavity 5.34 through the connecting port 5.35, and the rack 9.1 is on the shaft rod 9.21. A gear 9.22 is meshed with the shaft rod 9.21, a bevel gear 9.23 is fixed on the shaft rod 9.21, and the tooth meshing unit 9.2 also includes a slide groove 9.24 provided on the side of the columnar block 5.22, a slide block 9.25 is slidably engaged in the slide groove 9.24, and a tooth surface portion 9.26 that can mesh with the bevel gear 9.23 is provided on the slide block 9.25. The slide block 9.25 has a meshing position on the slide groove 9.24 that meshes with the bevel gear 9.23, and a disengagement position that is separated from the bevel gear 9.23. The length direction of the slide block 9.25 is parallel to the length direction of the columnar block 5.22, and the slide block 9.25 can move in the direction of the axis center line of the shaft rod 9.21 in the slide groove 9.24;

In actual use, when the columnar block 5.22 moves axially, the slider block 9.25 meshes with the bevel gear 9.23 through the tooth surface 9.26, so that the shaft rod 9.21 meshes with the rack 9.1 through the gear 9.22, thereby changing the corresponding position between the notch portion 5.33 on the baffle 5.32 and the prismatic rod 8.1, thereby realizing the switching of the blocking position and the avoidance position of the block unit 5.

In another embodiment provided by the present invention, the above-mentioned interlocking mechanism is provided on a low-voltage switch cabinet, when the drawer box 2 is pulled outward to the pulled-out position, the card block unit 5 is in an upright state, and the card block unit 5 is automatically locked with the first lock column unit 6.1 at the pulled-out position, thereby automatically locking the position of the drawer box 2 in the pulled-out position; when the drawer box 2 is pushed from the pulled-out position to the inserted position, the card block unit 5 is in an inverted state, and the card block unit 5 is automatically locked with the second lock column unit 6.2 at the pulled-out position, thereby automatically locking the position of the drawer box 2 in the inserted position, and the whole process is simple and convenient to operate.

The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that, for those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims (8)

1. An interlocking mechanism, comprising a cabinet (1) and a drawer box (2) mounted on the cabinet (1), characterized in that the drawer box (2) has an insertion position and a pull-out position on the cabinet (1), and the cabinet (1) and the drawer box (2) are connected via a self-locking mechanism, wherein the self-locking mechanism comprises: A lock assembly (3), comprising a shaft unit (4) rotatably mounted on the drawer box (2), wherein a block unit (5) is provided on the shaft unit (4); A locking assembly (6), comprising a first locking column unit (6.1) which is automatically locked with the locking assembly (3) when the drawer box (2) is pulled out, and a second locking column unit (6.2) which is automatically locked with the locking assembly (3) when the drawer box (2) is inserted into the drawer box; The shaft rod unit (4) comprises a rod column (4.1), a track groove (4.2) is provided on the column surface of the rod column (4.1), a sliding column (4.3) fixed to the cabinet (1) is adapted to be slidably engaged in the groove body of the track groove (4.2), and the shaft rod unit (4) can also undergo corresponding axial deflection while moving in the axial direction; The block unit (5) comprises a block body (5.1), the block body (5.1) being provided with a linkage assembly (5.2) and a locking assembly (5.3), the locking assembly (5.3) having a locked state in which it is locked with a locking assembly (6), and also having an unlocked state in which it can be separated from the locking assembly (6). 2. An interlocking mechanism according to claim 1, characterized in that the axis line of the shaft rod unit (4) is parallel to the trajectory line of the drawer box (2), and the shaft rod unit (4) has a pushing force to move toward the insertion position when the drawer box (2) is pushed in, and the shaft rod unit (4) has a pulling force to move toward the pull-out position when the drawer box (2) is pulled out. 3. An interlocking mechanism according to claim 2, characterized in that the first lock column unit (6.1) and the second lock column unit (6.2) are of the same structure and both include a column (7), and a protruding piece (8) that cooperates with the locking assembly (5.3) is installed on the column (7). 4. An interlocking mechanism according to claim 3, characterized in that a supporting plate (1.1) is fixed inside the cabinet (1), and a recessed groove (1.2) is provided on the supporting plate (1.1) for the shaft rod unit (4) to pass through, and the first locking column unit (6.1) is installed at a position on the supporting plate (1.1) corresponding to the moving trajectory of the block unit (5). 5. An interlocking mechanism according to claim 4, characterized in that the linkage component (5.2) includes an installation opening (5.21) opened on the plate body (5.1), and a columnar block (5.22) fixed to the rod column body (4.1) is adapted to be inserted into the installation opening (5.21), and a bar wheel engagement mechanism (9) is provided on both sides of the columnar block (5.22), and the bar wheel engagement mechanism (9) is driven by the columnar block (5.22) to control the state switching of the card limit component (5.3). 6. An interlocking mechanism according to claim 5, characterized in that the locking assembly (5.3) includes a through hole (5.31) opened in the plate body (5.1), a retaining bar (5.32) is movably installed in the through hole (5.31), and a notch portion (5.33) is opened on the retaining bar (5.32) for the protruding member (8) to pass through. 7. An interlocking mechanism according to claim 6, characterized in that a long cavity (5.34) is provided on the wall of the insertion port (5.31), a connecting port (5.35) connected to the installation port (5.21) is provided on the cavity wall of the long cavity (5.34), and the long cavity (5.34) is plugged and matched with the baffle (5.32). 8. A low voltage switch cabinet, characterized by comprising the interlocking mechanism according to any one of claims 1 to 7.