Magnetic self-locking connecting device for cable bridge

Abstract

The application belongs to the technical field of cable bridge and discloses a magnetic self-locking connecting device for cable bridge, which comprises bridge one and bridge two which are horizontally butted, further comprises U-shaped mounting frame one and U-shaped mounting frame two which are respectively arranged on the outer sides of the ends of bridge one and bridge two which are close to each other, and a magnetic locking assembly is arranged between the U-shaped mounting frame one and the U-shaped mounting frame two. The magnetic locking assembly, the magnetically rotatable locking rod, the self-rebound rotating shaft, the strong magnetic inner core, the metal magnetic suction block and the tapered plug are matched with each other, the stable magnetic suction force is provided by the strong magnetic inner core, the metal magnetic suction block can normally adsorb the magnetically rotatable locking rod, the guide structure of the tapered plug and the automatic reset characteristic of the self-rebound rotating shaft are matched, the posture of the locking rod does not need to be manually adjusted during the butt joint process of the bridge, and only the straight pushing action can complete the whole action of plug-in, magnetic release, automatic return and vertical locking, so that the assembly process of the butt joint of the bridge is effectively simplified.

Description

Technical Field

[0001] This invention belongs to the field of cable tray technology, specifically a magnetic self-locking connection device for cable trays. Background Technology

[0002] Cable trays, as an important load-bearing structure in cable laying projects, are widely used in various cabling scenarios such as building electromechanical systems, industrial plants, and data centers. Adjacent cable tray sections typically require a dedicated connection structure for connection and fixation to ensure the overall continuity and stability of the tray. Currently, the mainstream connection methods for cable trays in the industry mainly include three types: traditional bolt fastening connections, purely mechanical snap-fit ​​connections, and simple magnetic connections.

[0003] For example, CN216530378U discloses a quick-connect device for cable trays, comprising two cable tray bodies and two connectors. Each cable tray body has multiple grooves on both sides, with a through hole on one inner wall of each groove. Two grooves are connected through the through hole. Each connector has a rectangular hole on one side, with a connecting insert fixedly connected to the inner wall of one side of the rectangular hole. The connecting insert has a wavy structure and engages with the groove and the through hole. This invention can quickly connect two cable tray bodies together, is simple to operate, and improves the connection efficiency of cable trays.

[0004] However, existing cable tray connection structures cannot meet the construction requirements for efficient, stable, and automated docking in actual use. First, the assembly process of traditional bolt connections and purely mechanical snap-fit ​​connections is cumbersome. The docking process requires manual calibration of the cable tray posture and adjustment of the alignment position. The assembly process is complicated, and the alignment error tolerance is low, which greatly reduces the construction efficiency of cable tray on-site installation. It is difficult to adapt to complex construction scenarios such as high altitude and confined spaces. Moreover, most traditional simple magnetic connection structures rely solely on magnetic adsorption for positioning and lack supporting mechanical linkage structures. The release of magnetic constraints and the insertion and reset of locking rods both require manual assistance. The overall linkage of the structure is poor, and the various assembly actions cannot be synchronized. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides a magnetic self-locking connection device for cable trays.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a magnetic self-locking connection device for cable trays, comprising a cable tray one and a cable tray two that are horizontally connected to each other, and further comprising a U-shaped mounting frame one and a U-shaped mounting frame two respectively disposed on the outer side of the cable tray one and the cable tray two that are close to each other at one end, wherein a magnetic locking component is provided between the U-shaped mounting frame one and the U-shaped mounting frame two. The magnetic locking assembly includes magnetic horizontal fixing rods fixedly connected to both sides of one end of the U-shaped mounting frame 1 near the other end of the U-shaped mounting frame 2. The free end of the magnetic horizontal fixing rod is provided with a self-rebound rotating shaft. The end of the self-rebound rotating shaft away from the magnetic horizontal fixing rod is equipped with a magnetic rotatable locking rod. Two rectangular insertion holes are opened on the side end of the U-shaped mounting frame 2. The magnetic rotatable locking rod passes through the rectangular insertion holes. A vertical docking slot is opened on the end of the U-shaped mounting frame 2 away from the U-shaped mounting frame 1. The magnetic locking assembly has deformation linkage components on both sides. The deformation linkage components include fixed mounting blocks fixedly connected to the inner walls of both sides of the U-shaped mounting frame one. A telescopic crossbar is fixedly connected to one end of the fixed mounting block near the U-shaped mounting frame two. An elastic spring is sleeved on the outside of the telescopic crossbar. A metal magnetic block is fixedly connected to one end of the telescopic crossbar away from the fixed mounting block. The metal magnetic block forms a magnetic connection with the magnetic rotatable locking rod. Pushing blocks are symmetrically fixedly connected to the inner walls of both sides of the U-shaped mounting frame two. Strong magnetic cores are fixedly embedded in the magnetic horizontal fixed insertion rod and the magnetic rotatable locking rod.

[0007] Preferably, the rectangular socket is provided with an anti-detachment component, which includes a rectangular rubber liner and is fixedly connected to the inner wall of the rectangular socket.

[0008] Preferably, the inner wall of the rectangular rubber liner is fixedly provided with a plurality of anti-slip patterns, and the plurality of anti-slip patterns are formed and arranged on the inner wall surface of the rectangular rubber liner facing the cavity.

[0009] Preferably, a conical plug is fixedly connected to the end of the magnetic rotatable locking rod away from the self-rebound pivot, and the conical plug has a frustum-shaped outline.

[0010] Preferably, the push block, the metal magnetic block, the fixed mounting block, and the telescopic crossbar in the same group are located on the same axis.

[0011] Preferably, the magnetic rotatable locking rod can engage and lock with the vertical docking slot, and the magnetic horizontal fixing rod can form a plug-in limiting fit with the rectangular insertion hole.

[0012] Preferably, the vertical docking slot is formed on the outer end face of the second U-shaped mounting frame, and the groove contour of the vertical docking slot is adapted to the outer contour of the rod body after the magnetic rotatable locking rod is rotated.

[0013] Preferably, the two magnetic lateral fixing rods of the magnetic locking assembly are symmetrically arranged at both ends of the U-shaped mounting frame, and the telescopic crossbar is symmetrically arranged at both ends of the U-shaped mounting frame.

[0014] Preferably, the rectangular insertion hole is formed through the side wall of the second U-shaped mounting frame, and the rectangular insertion hole forms a through cavity through which the magnetic rotatable locking rod can pass.

[0015] Preferably, the metal magnetic block has a T-shaped step structure, and the step end face of the metal magnetic block forms a contact station.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a structure that combines a magnetic locking assembly, a magnetic rotatable locking rod, a self-rebound rotating shaft, a strong magnetic core, a metal magnetic block, and a tapered plug. The strong magnetic core provides a stable magnetic attraction force, allowing the metal magnetic block to normally attract and limit the magnetic rotatable locking rod. Combined with the guiding structure of the tapered plug and the automatic reset characteristic of the self-rebound rotating shaft, the cable tray docking process eliminates the need for manual adjustment of the locking rod's posture. The entire process of insertion, demagnetization, automatic return, and vertical locking can be completed simply through a linear pushing motion. This effectively simplifies the assembly process of cable tray docking, improves upon the cumbersome alignment and numerous assembly steps of traditional bolt connections and mechanical snap-fit ​​connections, and significantly enhances the ease of construction and assembly efficiency of cable tray docking installation. This invention utilizes a structure that integrates a deformation linkage component, a push block, a telescopic crossbar, an elastic spring, a fixed mounting block, and a metal magnetic block. The linear propulsion power from the bridge frame connection drives the push block to push the metal magnetic block, precisely releasing the magnetic constraint of the rotatable locking rod. Mechanical linkage replaces manual unlocking of the magnetic structure, achieving synchronous linkage between the release of the magnetic constraint and the insertion of the locking rod. Simultaneously, the elastic spring provides stable reset force during disassembly, ensuring the stability of the structure's cyclical movement. This invention overcomes the shortcomings of traditional simple magnetic connection structures, such as poor linkage, reliance on manual operation, and chaotic linkage logic, effectively improving the linkage accuracy and structural adaptability of the device's opening and closing actions. This invention utilizes a combination of a vertical docking slot, a rectangular insertion hole, an anti-detachment component, a rectangular rubber inner liner, anti-slip texture, and a U-shaped mounting frame. The vertical docking slot rigidly engages and limits the magnetic rotatable locking rod after reset, while the rectangular rubber inner liner and the anti-slip texture provide elastic frictional gripping, achieving a dual protective effect of mechanical rigid locking and frictional anti-detachment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of cable tray 1 and cable tray 2 in their mating state according to the present invention; Figure 2 This is a schematic diagram of the overall structure of the U-shaped mounting frame one and the U-shaped mounting frame two in their mating state according to the present invention; Figure 3 This is a partially truncated enlarged structural diagram of the U-shaped mounting frame of the present invention; Figure 4This is a partially truncated enlarged structural diagram of the U-shaped mounting frame of the present invention; Figure 5 This is a schematic diagram of the locking state structure of the magnetic locking assembly of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the rectangular socket of the present invention; Figure 7 This is a schematic diagram of the rectangular rubber inner liner structure of the present invention; Figure 8 This is an enlarged structural schematic diagram of the magnetic locking assembly of the present invention.

[0018] In the diagram: 1. Cable tray one; 2. Cable tray two; 3. U-shaped mounting frame one; 4. U-shaped mounting frame two; 5. Magnetic locking assembly; 500. Magnetic horizontal fixing rod; 501. Self-rebound rotating shaft; 502. Magnetic rotatable locking rod; 503. Rectangular insertion hole; 504. Vertical docking slot; 6. Deformation linkage assembly; 600. Fixed mounting block; 601. Telescopic crossbar; 602. Elastic spring; 603. Metal magnetic block; 604. Pushing block; 7. Anti-detachment assembly; 700. Rectangular rubber inner liner; 701. Anti-slip texture; 8. Conical plug; 9. Strong magnetic core. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 8 As shown, the present invention provides a magnetic self-locking connection device for cable trays, including a cable tray 1 and a cable tray 2 that are horizontally connected to each other, and U-shaped mounting frames 3 and 4 respectively disposed on the outer sides of the cable tray 1 and cable tray 2 near one end. A magnetic locking assembly 5 is provided between the U-shaped mounting frames 3 and 4. The magnetic locking assembly 5 includes magnetic horizontal fixing rods 500 fixedly connected to both sides of the U-shaped mounting frame 3 near the U-shaped mounting frame 4. The free end of the magnetic horizontal fixing rod 500 is provided with a self-rebound rotating shaft 501. The end of the self-rebound rotating shaft 501 away from the magnetic horizontal fixing rod 500 is equipped with a magnetic rotatable locking rod 502. Two rectangular insertion holes 503 are opened on the side end of the U-shaped mounting frame 4. The magnetic rotatable locking rod 502 passes through the rectangular insertion holes 503. A vertical docking groove 504 is opened on the end of the U-shaped mounting frame 4 away from the U-shaped mounting frame 3.

[0021] The above scheme is adopted: the self-rebound rotating shaft 501 serves as the core component for rotation and reset, enabling flexible adjustment and autonomous reset of the magnetic rotatable locking rod 502. As the core structural basis for automatic locking of the device, the rectangular insertion hole 503 and the vertical docking slot 504 are arranged in sections to respectively realize the insertion guidance and terminal locking functions, with clear division of labor and strong structural stability.

[0022] like Figures 2 to 8 As shown, deformation linkage components 6 are respectively provided on both sides of the magnetic locking component 5. The deformation linkage component 6 includes a fixed mounting block 600 fixedly connected to the inner walls of both sides of the U-shaped mounting frame 3. A telescopic crossbar 601 is fixedly connected to one end of the fixed mounting block 600 near the U-shaped mounting frame 4. An elastic spring 602 is sleeved on the outside of the telescopic crossbar 601. A metal magnetic block 603 is fixedly connected to one end of the telescopic crossbar 601 away from the fixed mounting block 600. The metal magnetic block 603 forms a magnetic connection with the magnetic rotatable locking rod 502. Pushing blocks 604 are symmetrically fixedly connected to the inner walls of both sides of the U-shaped mounting frame 4. A strong magnetic core 9 is fixedly embedded in the magnetic transverse fixed insertion rod 500 and the magnetic rotatable locking rod 502 respectively. The strong magnetic core 9 is a permanent magnet, which is fixedly embedded in the axial mounting holes inside the magnetic transverse fixed insertion rod 500 and the magnetic rotatable locking rod 502 by interference fit or adhesive.

[0023] The above scheme is adopted: the deformation linkage component 6 serves as the core linkage structure for the magnetic unlocking and elastic reset of the device. It works in conjunction with the magnetic locking component 5 to realize the mechanized linkage operation of the cable tray docking process. There is no need for manual unlocking and reset adjustment, which effectively improves the automation adaptability of the device. The metal magnetic block 603 relies on the magnetic field of the strong magnetic core 9 to form a stable magnetic attraction with the magnetic rotatable locking rod 502. It can stably constrain the posture of the magnetic rotatable locking rod 502 in the initial state. The push block 604 moves synchronously with the cable tray docking displacement, which can accurately trigger the magnetic constraint release action, realize the synchronous linkage of mechanical propulsion and magnetic unlocking, and solve the problems of disjointed action and weak linkage of traditional structures.

[0024] like Figures 2 to 8As shown, an anti-detachment component 7 is provided inside the rectangular insertion hole 503. The anti-detachment component 7 includes a rectangular rubber inner liner 700, which is fixedly connected to the inner wall of the rectangular insertion hole 503. Multiple anti-slip patterns 701 are fixedly provided on the inner wall of the rectangular rubber inner liner 700 facing the hole cavity. The multiple anti-slip patterns 701 are formed and arranged on the inner wall surface of the rectangular rubber inner liner 700 facing the hole cavity. A conical plug 8 is fixedly connected to one end of the magnetic rotatable locking rod 502 away from the self-rebound pivot 501. The conical plug 8 has a frustum-shaped outline. The same set of push blocks 604, metal magnetic blocks 603, fixed mounting blocks 600, and telescopic crossbars 601 are located on the same axis. The magnetic rotatable locking rod 502 can engage and lock with the vertical docking slot 504. The magnetic horizontal... The fixed insertion rod 500 can form a plug-in limiting fit with the rectangular insertion hole 503. The vertical docking slot 504 is opened on the outer end face of the U-shaped mounting frame 2 4, and the groove contour of the vertical docking slot 504 is adapted to the outer contour of the rod body after the magnetic rotatable locking rod 502 is rotated. The two magnetic horizontal fixed insertion rods 500 of the magnetic locking assembly 5 are symmetrically arranged at both ends of the U-shaped mounting frame 1 3, and the telescopic crossbar 601 is symmetrically arranged at both ends of the U-shaped mounting frame 1 3. The rectangular insertion hole 503 is opened through on the side wall of the U-shaped mounting frame 2 4. The rectangular insertion hole 503 forms a through cavity through which the magnetic rotatable locking rod 502 can pass. The metal magnetic block 603 has a T-shaped step structure, and the step end face of the metal magnetic block 603 forms abutment station.

[0025] The above solution is adopted: the anti-detachment component 7 serves as an auxiliary stabilizing structure for the insertion part. After the magnetic rotatable locking rod 502 is inserted into place, it can elastically hold and frictionally limit the rod body. The rectangular rubber inner liner 700 has good elastic adaptability and can fit the outer wall of the rod with different insertion gaps, adapting to the small assembly errors in the assembly process. At the same time, it can buffer the slight vibration during the operation of the equipment and reduce the probability of the rod body loosening.

[0026] Working principle and usage process of this invention: When the equipment is in its initial static state, cable tray 1 and cable tray 2 are arranged horizontally relative to each other. U-shaped mounting frame 3 is fixedly assembled on the outer side of the docking end of cable tray 1, and U-shaped mounting frame 4 is fixedly assembled on the outer side of the docking end of cable tray 2. Magnetic locking components 5 are symmetrically arranged at both ends of U-shaped mounting frame 3, and deformation linkage components 6 are correspondingly matched and arranged on both sides of magnetic locking components 5. The overall assembly structure maintains a symmetrical and stable state. The metal magnetic block 603 and the magnetic rotatable locking rod 502 maintain a stable magnetic attraction and fit under the magnetic field of the strong magnetic core 9, thereby keeping the magnetic rotatable locking rod 502 in an inclined, ready-to-connect posture. When carrying out the cable tray docking operation, a horizontal pushing force is first applied to cable tray 2 to make the cable tray... As cable tray 2 moves smoothly laterally toward cable tray 1, U-shaped mounting frame 24 moves synchronously with cable tray 2, gradually approaching U-shaped mounting frame 3. During the process of the frames fitting together, the magnetic locking assembly 5 mounted on U-shaped mounting frame 3 is simultaneously subjected to force, causing the deformation linkage assemblies 6 arranged on both sides to shift laterally. During this process, the push block 604 fixed inside U-shaped mounting frame 24 moves continuously with the frame, gradually contacting the corresponding metal magnetic block 603. Subsequently, the push block 604 continuously applies an axial pushing force to the metal magnetic block 603, causing the metal magnetic block 603 to slide smoothly along the axis of the telescopic crossbar 601. During the sliding process, the metal magnetic block 603 will exert force on the telescopic crossbar 601. The externally fitted elastic spring 602 is compressed, causing it to undergo controllable elastic deformation and store elastic potential energy. As the metal magnetic block 603 continues to move laterally, the distance between the metal magnetic block 603 and the magnetic rotatable locking rod 502 gradually increases, and the magnetic coupling effect between them gradually weakens. This causes the magnetic rotatable locking rod 502 to gradually detach from the magnetic constraint of the metal magnetic block 603. During the synchronous phase of the release of the magnetic constraint, the conical plug 8 fixed at the end of the magnetic rotatable locking rod 502 is precisely aligned with the rectangular insertion hole 503 on the side wall of the U-shaped mounting frame 4 as the whole body moves forward. The conical plug 8 uses its own frustum structure to complete the insertion guidance, assisting the magnetic rotatable locking rod 502 to smoothly enter the rectangular insertion hole 503. After the magnetic rotatable locking rod 502 enters the hole, it can be guided and limited throughout its entire length by relying on the regular cavity structure of the rectangular insertion hole 503, restricting the rod from shifting or swaying. This ensures that the magnetic rotatable locking rod 502 continues to extend outward along a fixed trajectory. As the cable tray 2 continues to advance, the magnetic rotatable locking rod 502 gradually penetrates the rectangular insertion hole 503 and extends outward until the entire structure of the magnetic rotatable locking rod 502 completely leaves the cavity limitation range of the rectangular insertion hole 503. When the magnetic rotatable locking rod 502 loses the constraint of the rectangular insertion hole 503, it can autonomously complete the angle rotation action through the rotation performance of the self-rebound rotating shaft 501 mounted at its root, gradually adjusting to a vertical state. After the posture reset is completed,The magnetically rotatable locking rod 502, in a vertical position, can engage with the vertical mating slot 504 on the outer end face of the U-shaped mounting frame 4. Positioning and locking are achieved through the structural cooperation between the rod and the slot, thus completing the rapid docking and assembly of cable tray 1 and cable tray 2. After the locking assembly is completed, the rectangular rubber inner liner 700, fixed to the inner wall of the rectangular insertion hole 503, can elastically fit against the outer surface of the magnetic rotatable locking rod 502. The anti-slip texture 701 evenly distributed on the inner side of the rectangular rubber inner liner 700 can maintain close contact with the rod body. The frictional force of the contact surface improves the insertion stability of the rod body and reduces small-amplitude swaying and displacement of the rod body. The symmetrically arranged magnetic locking component 5 and deformation linkage component 6 can evenly distribute the stress load at the docking part, ensuring the overall structural stability of the two cable tray sections after docking. When carrying out the cable tray disassembly operation, cable tray 1 and cable tray 2 are subjected to... Applying a horizontally opposing pulling force causes the two cable tray sections to gradually move away from each other. The magnetic rotatable locking rod 502 gradually disengages from the locking limit of the vertical docking slot 504, releasing the overall locking state. At the same time, the elastic spring 602 releases the elastic potential energy stored in the previous period, pushing the metal magnetic block 603 to reset along the axis. After resetting, the metal magnetic block 603 re-forms a magnetic attraction with the magnetic rotatable locking rod 502, causing the magnetic rotatable locking rod 502 to rotate and tilt, allowing the magnetic rotatable locking rod 502 to smoothly retract and disengage from the rectangular insertion hole 503, ultimately achieving a smooth separation of cable tray 1 and cable tray 2.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A magnetic self-locking connection device for cable trays, comprising cable tray one (1) and cable tray two (2) horizontally connected to each other, characterized in that: It also includes U-shaped mounting frame 1 (3) and U-shaped mounting frame 2 (4) respectively set on the outer side of one end of cable tray 1 (1) and cable tray 2 (2), and a magnetic locking assembly (5) is provided between the U-shaped mounting frame 1 (3) and U-shaped mounting frame 2 (4). The magnetic locking assembly (5) includes magnetic horizontal fixing rods (500) fixedly connected to both sides of the U-shaped mounting frame one (3) near the U-shaped mounting frame two (4). The free end of the magnetic horizontal fixing rod (500) is provided with a self-rebound rotating shaft (501). The end of the self-rebound rotating shaft (501) away from the magnetic horizontal fixing rod (500) is equipped with a magnetic rotatable locking rod (502). The side end of the U-shaped mounting frame two (4) is provided with two rectangular insertion holes (503). The magnetic rotatable locking rod (502) passes through the rectangular insertion holes (503). The end of the U-shaped mounting frame two (4) away from the U-shaped mounting frame one (3) is provided with a vertical docking slot (504). The magnetic locking assembly (5) is provided with deformation linkage assembly (6) on both sides. The deformation linkage assembly (6) includes a fixed mounting block (600) fixedly connected to the inner walls of both sides of the U-shaped mounting frame (3). The fixed mounting block (600) is fixedly connected to a telescopic crossbar (601) at one end near the U-shaped mounting frame (4). An elastic spring (602) is sleeved on the outside of the telescopic crossbar (601). A metal magnetic block (603) is fixedly connected to the end of the telescopic crossbar (601) away from the fixed mounting block (600). The metal magnetic block (603) forms a magnetic connection with the magnetic rotatable locking rod (502). Push blocks (604) are symmetrically fixedly connected to the inner walls of both sides of the U-shaped mounting frame (4). A strong magnetic core (9) is fixedly embedded in the magnetic horizontal fixed insert rod (500) and the magnetic rotatable locking rod (502).

2. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The rectangular socket (503) is provided with an anti-detachment component (7), which includes a rectangular rubber inner liner (700) and is fixedly connected to the inner wall of the rectangular socket (503).

3. The magnetic self-locking connection device for cable trays according to claim 2, characterized in that: The inner wall of the rectangular rubber liner (700) is fixedly provided with a plurality of anti-slip textures (701), and the plurality of anti-slip textures (701) are formed and arranged on the inner wall surface of the rectangular rubber liner (700) facing the cavity.

4. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The magnetic rotatable locking rod (502) is fixedly connected to a conical plug (8) at the end away from the self-rebound pivot (501), and the conical plug (8) has a frustum-shaped outline.

5. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The push block (604), metal magnetic block (603), fixed mounting block (600), and telescopic crossbar (601) of the same group are located on the same axis.

6. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The magnetic rotatable locking rod (502) can engage and lock with the vertical docking slot (504), and the magnetic horizontal fixing rod (500) can form a plug-in limiting fit with the rectangular insertion hole (503).

7. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The vertical docking slot (504) is opened on the outer end face of the U-shaped mounting frame (4), and the groove contour of the vertical docking slot (504) is adapted to the outer contour of the rod body after the magnetic rotatable locking rod (502) is rotated.

8. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The two magnetic horizontal fixing rods (500) of the magnetic locking assembly (5) are symmetrically arranged at both ends of the U-shaped mounting frame (3), and the telescopic crossbar (601) is symmetrically arranged at both ends of the U-shaped mounting frame (3).

9. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The rectangular insertion hole (503) is opened through the side wall of the second U-shaped mounting frame (4), and the rectangular insertion hole (503) forms a through cavity through which the magnetic rotatable locking rod (502) can pass.

10. The magnetic self-locking connection device for cable trays according to claim 1, characterized in that: The metal magnetic block (603) has a T-shaped step structure, and the step end face of the metal magnetic block (603) forms a contact station.

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