Tool-free installation cable bridge and installation method thereof

Abstract

The invention discloses a tool-free installation cable bridge and an installation method thereof.The tool-free installation cable bridge comprises a cable bridge body, an end plugging assembly and a plugging block matched with the other end of the cable bridge body, the plugging assembly is provided with a butt joint frame fixed to the end of the body, and plugging grooves are formed in the two sides of the inner wall of the plugging assembly and used for allowing the plugging block to be inserted therein; the top of the groove body is provided with a locking block and a positioning rod, the insertion block is correspondingly provided with a locking groove and a positioning hole, the locking block is locked into the groove, and the positioning rod is inserted into the hole and extends to the bottom of the groove body; the locking block is connected with the drawing rod, the positioning rod is provided with the lifting handle in a jacking manner, and the two are arranged in a placement groove in the top of the butt-joint frame; the end part of the butt-joint frame is provided with an external expansion butt-joint hopper, the end part of the body is an inclined surface, and the size of the plug-in block is smaller than that of the groove body, so that quick butt-joint is assisted without complicated tools; the positioning rod performs longitudinal limiting, the locking block performs transverse limiting, and double fixing and loosening prevention are achieved; unlocking and separating can be achieved by lifting the pull rod and the handle, and the assembly is not damaged. The placement groove accommodates components, is anti-scraping and does not affect laying of the cover plate.

Description

TECHNICAL FIELD

[0001] The present application relates to a tool-free installation cable bridge and its installation method. BACKGROUND

[0002] The cable bridge is an important facility for supporting, protecting and managing cables and wires, and is widely used in power distribution systems of various projects such as buildings, factories and data centers. The traditional cable bridge system is usually assembled and connected on site by straight sections, elbows, tees, crosses and other components through bolts, connecting plates and other fasteners.

[0003] The traditional bolt connection method requires the construction personnel to perform a series of tedious operations such as alignment, bolt insertion and nut tightening at each connection point on site. In large projects, the number of connection points is large, resulting in a long overall installation period, a large amount of labor time, and an increase in construction cost. Moreover, bolt connection requires the use of tools such as wrenches and screwdrivers, which is extremely inconvenient in narrow, high-altitude or insufficient light operating environments, and poses a safety hazard. In addition, it is difficult to ensure that the tightening torque of each connection point is uniform. If the bolt is not tightened or loosens due to vibration or load changes during use, it will cause gaps at the bridge connection, affecting the structural stability and load capacity of the entire bridge system. In addition, the metal bridge may affect the electrical continuity and adversely affect the grounding performance due to poor contact at the bolt connection.

[0004] Therefore, it is necessary to invent a tool-free installation cable bridge and its installation method to solve the above problems. SUMMARY

[0005] (I) Invention purpose The purpose of the present application is to provide a tool-free installation cable bridge and its installation method.

[0006] (II) Technical solution In order to achieve the above purpose, the present application provides the following technical solution: a tool-free installation cable bridge, comprising a plug-in assembly arranged at the end of the cable bridge body, and the other end of the cable bridge body is provided with a plug-in block matched with each other; The plug-in assembly comprises a butt joint frame fixed outside the end of the cable bridge body, the inner wall of the butt joint frame is provided with a plug-in groove body matched with the plug-in block, the plug-in block is inserted into the plug-in groove body, the top of the plug-in groove body is provided with a locking block and a positioning rod, the plug-in block is provided with a locking groove and a positioning hole matched with the locking block and the positioning rod, the locking block is locked into the locking groove, the positioning rod is inserted into the positioning hole and extends to the bottom of the plug-in groove body, the end of the locking block is connected with a pull rod, and the top of the positioning rod is further provided with a pull handle, and the top of the pull rod and the pull handle are arranged on the top of the butt joint frame; The docking frame top is provided with a pull-out hole for accommodating the pull-out rod, and one side of the pull-out hole is further provided with a pull-out hole for inserting the pull handle.

[0007] Preferably, the docking end of the docking frame is provided with an outwardly expanding docking bucket, the plug-in groove body is inserted with the plug-in block, the top of the plug-in groove body is provided with a moving hole for mounting the locking block, one side of the moving hole is provided with a limiting slot for inserting the positioning rod, and the bottom of the plug-in groove body is further provided with a through slot matched with the limiting slot. The locking block moves vertically in the moving hole, and the end of the positioning rod passes through the limiting slot, the positioning hole and the bottom of the through slot.

[0008] Preferably, the locking block is externally provided with a limiting ring, the bottom of the positioning rod is provided with a baffle, and the upper and lower ends of the moving hole are both provided with a limiting frame matched with the limiting ring. The top of the limiting slot is provided with an extension frame for limiting the movement of the baffle, that is, the positioning rod is retracted into the limiting slot.

[0009] Preferably, the pull-out rod is fixed at the end of the locking block and extends to the top of the pull-out hole, the top of the pull-out rod is externally provided with a limiting plate larger than the size of the pull-out hole, and the top of the pull-out rod above the limiting plate is provided with symmetrical fixed plates. The pull handle extends with connecting rods at both ends, the bottom of the connecting rod is connected with the top of the positioning rod through a rotating piece, the pull handle rotates at the top of the positioning rod as a whole, and the fixed plate fixes the connecting rod.

[0010] Preferably, the distance between the symmetrical fixed plates matches the size of the connecting rod, and the size of the pull handle meets the requirement that it does not affect the rotation of the positioning rod at the top of the positioning rod when the positioning rod is fully retracted.

[0011] Preferably, the overall size of the docking slot is larger than the overall size of the pull handle.

[0012] Preferably, the upper and lower surfaces of the cable bridge body outside the mounting position of the plug-in block are inclined surfaces, and the overall size of the plug-in block is smaller than the internal size of the plug-in groove body.

[0013] Preferably, the top of the cable bridge body is further paved with a cover plate.

[0014] A tool-free installation method of a cable bridge, comprising: S1, align the plug-in assembly at the end of the first cable bridge body with the plug-in block at the end of the second cable bridge body, check the pull-out rod and the pull handle in the docking frame top of the first cable bridge body in the docking frame top of the first cable bridge body, at this time the locking block is retracted into the moving hole of the docking frame, and the positioning rod is retracted into the limiting slot of the docking frame. S2. Guided by the outward expansion of the docking bucket at the docking end of the docking frame, insert the plug-in block of the second cable tray body into the plug-in grooves on both sides of the inner wall of the docking frame of the first cable tray body. Utilize the inclined surfaces on the upper and lower surfaces of the end of the first cable tray body located outside the plug-in block installation position to assist in guiding the plug-in block into the plug-in groove smoothly. S3. Press down on the pull handle to move the positioning rod downward along the limiting groove, so that the end of the positioning rod passes through the positioning hole of the plug-in block and extends into the through groove at the bottom of the plug-in groove until the baffle at the bottom of the positioning rod abuts against the extension frame at the top of the limiting groove; release the pull rod so that the locking block moves vertically downward along the moving hole under its own weight and locks into the corresponding locking groove of the plug-in block. At this time, the limiting ring outside the locking block cooperates with the limiting frame at the lower end of the moving hole to achieve limiting. S4. Check the fit between the locking block and the locking groove, and between the positioning rod and the positioning hole. After confirming that there are no errors, lay a cover plate on the top of the first cable tray body and the second cable tray body to complete the entire docking process.

[0015] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of the present invention are: 1. The docking frame of this invention is provided with an outwardly expanding docking bucket at the end, which can quickly guide the plug-in block of another cable tray to align with the slot, avoiding the problem of repeated alignment in traditional docking; the end of the cable tray body is set as a slope, and the design of the plug-in block size being smaller than the plug-in slot further reduces the plugging resistance, so that even non-professionals can quickly complete the initial docking without relying on complicated tools. 2. The positioning rod of the present invention passes through the limiting groove, the positioning hole of the plug-in block and the through groove at the bottom of the plug-in groove, thereby restricting the vertical displacement of the cable tray in the longitudinal direction; the locking block is embedded in the locking groove, thereby restricting the horizontal displacement of the cable tray in the lateral direction; the dual structure forms a three-dimensional fixation, which can effectively resist the loosening of the connection caused by the cable's own weight, vibration or slight external force collision, and avoid the problem of easy detachment of traditional single-point fixation. 3. This invention only requires lifting the pull rod and pulling the handle to unlock and easily separate the cable tray without damaging the components; the mounting slot can accommodate the top structure of the pull handle and pull rod, preventing protruding parts from scratching the cables or operators, while keeping the top of the cable tray flat and not affecting the subsequent cover plate laying. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the docking structure of the plug-in assembly of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the plug-in component of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the disassembled structure of the plug-in component of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the overall disassembled structure of the plug-in assembly of the present invention; Figure 6 This is a schematic diagram showing the disassembled structure of the lifting handle and positioning rod, locking block and pull rod of the present invention. Figure 7 This is a schematic diagram of the docking and installation structure of the plug-in assembly and the cable tray body of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Cable tray body; 2. Plug-in assembly; 21. Connecting frame; 211. Pull-out hole; 212. Lifting hole; 213. Installation slot; 214. Connecting bucket; 22. Plug-in slot body; 221. Moving hole; 222. Limiting slot; 223. Through slot; 224. Limiting frame; 225. Extension frame; 23. Locking block; 231. Limiting ring; 24. Positioning rod; 241. Baffle; 25. Pull-out rod; 251. Limiting plate; 252. Fixing plate; 26. Lifting handle; 261. Connecting rod; 3. Plug-in block; 31. Locking slot; 32. Positioning hole; 4. Cover plate. Detailed Implementation

[0019] 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.

[0020] This invention provides, for example Figures 1-7 The cable tray shown is a tool-free installation cable tray, including a plug-in assembly 2 disposed at one end of the cable tray body 1, and a matching plug-in block 3 disposed at the other end of the cable tray body 1. The plug-in assembly 2 includes a docking frame 21 fixed to the outer side of the end of the cable tray body 1. The inner walls of the docking frame 21 are provided with plug-in slots 22 for matching plug-in blocks 3. The plug-in blocks 3 are inserted into the plug-in slots 22. A locking block 23 and a positioning rod 24 are installed on the top of the plug-in slots 22. The plug-in blocks 3 are provided with locking grooves 31 and positioning holes 32 for matching locking blocks 23 and positioning rods 24. The locking block 23 is locked into the locking groove 31. The positioning rod 24 is inserted into the positioning hole 32 and extends to the bottom of the plug-in slots 22. A pull rod 25 is connected to the end of the locking block 23. A lifting handle 26 is also provided on the top of the positioning rod 24. The top of the pull rod 25 and the lifting handle 26 are both located on the top of the docking frame 21. The top of the docking frame 21 is provided with a pull hole 211 for accommodating the pull rod 25. On one side of the pull hole 211, there is also a lifting hole 212 for inserting the lifting handle 26. Both the pull hole 211 and the lifting hole 212 are located in the mounting groove 213.

[0021] Specifically, the docking end of the docking frame 21 is provided with an outwardly expanding docking bucket 214, the insertion block 3 is inserted into the insertion groove 22, the top of the insertion groove 22 is provided with a moving hole 221 for installing the locking block 23, the side of the moving hole 221 is provided with a limiting groove 222 for inserting the positioning rod 24, and the bottom of the insertion groove 22 is also provided with a through groove 223 that matches the limiting groove 222. The locking block 23 moves vertically in the moving hole 221, and the end of the positioning rod 24 passes through the limiting groove 222 and the positioning hole 32 to the bottom of the through groove 233.

[0022] Specifically, the locking block 23 is provided with a limiting ring 231 on the outside, the positioning rod 24 is provided with a baffle 241 at the bottom, the upper and lower ports of the moving hole 221 are provided with a limiting frame 224 matching the limiting ring 231, and the top slot of the limiting groove 222 is provided with an extension frame 225 to restrict the movement of the baffle 241, that is, the positioning rod 24 retracts into the limiting groove 222.

[0023] Specifically, the pull rod 25 is fixed to the end of the locking block 23 and extends to the top of the pull hole 211. A limiting plate 251 with a size larger than the pull hole 211 is provided on the outer side of the top of the pull rod 25. A symmetrical fixing plate 252 is provided on the top of the pull rod 25 above the limiting plate 251. Connecting rods 261 extend from both ends of the lifting handle 26. The bottom of the connecting rod 261 is connected to the top of the positioning rod 24 through a rotating part. The entire lifting handle 26 rotates on the top of the positioning rod 24. The fixing plate 252 fixes the connecting rod 261.

[0024] Specifically, the distance between the symmetrical fixing plates 252 matches the size of the connecting rod 261, and the size of the lifting handle 26 ensures that it does not affect the rotation of the positioning rod 24 at the top of the positioning rod 24 when the positioning rod 24 is fully retracted.

[0025] Specifically, the overall size of the mounting slot 213 is larger than the overall size of the lifting handle 26.

[0026] Specifically, the upper and lower surfaces of the cable tray body 1 located outside the installation position of the plug-in block 3 are set as inclined surfaces, and the overall size of the plug-in block 3 is smaller than the internal size of the plug-in groove 22.

[0027] Specifically, a cover plate 4 is also laid on the top of the cable tray body 1.

[0028] A method for using a tool-free cable tray includes: S1. Align the plug-in assembly 2 at the end of the first cable tray body 1 with the plug-in block 3 at the end of the second cable tray body 1. Check that the pull rod 25 and the lifting handle 26 in the top mounting groove 213 of the docking frame 21 of the first cable tray body 1 are in the initial state. At this time, the locking block 23 retracts into the moving hole 221 of the docking frame 21, and the positioning rod 24 retracts into the limiting groove 222 of the docking frame 21. S2. Guided by the outwardly expanding docking bucket 214 at the docking end of the docking frame 21, insert the plug block 3 of the second cable tray body 1 into the plug groove 22 on both sides of the inner wall of the docking frame 21 of the first cable tray body 1. Utilize the inclined surfaces on the upper and lower surfaces of the end of the first cable tray body 1 located outside the installation position of the plug block 3 to assist in guiding the plug block 3 into the plug groove 22 smoothly. S3. Press down on the pull handle 26 to move the positioning rod 24 downward along the limiting groove 222, so that the end of the positioning rod 24 passes through the positioning hole 32 of the plug-in block 3 and extends into the through groove 223 at the bottom of the plug-in groove body 22 until the baffle 241 at the bottom of the positioning rod 24 abuts against the extension frame 225 at the top opening of the limiting groove 222; release the pull rod 25 so that the locking block 23 moves vertically downward along the moving hole 221 under its own gravity and locks into the corresponding locking groove 31 of the plug-in block 3. At this time, the limiting ring 231 outside the locking block 23 cooperates with the limiting frame 224 at the lower end of the moving hole 221 to achieve limiting; S4. Check the engagement status of locking block 23 and locking groove 31, positioning rod 24 and positioning hole 32. After confirming that there are no errors, lay cover plate 4 on the top of the first cable tray body 1 and the second cable tray body 1 to complete the entire docking process.

[0029] In this invention, the same material as the cable tray body is used, and it is fixed to the outer side of the end of the cable tray body 1 by welding. The welded joints need to be rust-proofed. The spacing between the inner walls of the connecting frame 21 is consistent with the width of the cable tray body 1, ensuring that the plug-in block 3 is seamlessly connected to the cable tray body after insertion.

[0030] Specifically, the inner walls of the docking frame 21 are integrally formed on both sides, and the width of the groove is larger than the width of the plug-in block 3 to ensure that there is enough space for fixing after the plug-in block 3 is inserted; the top of the groove has a moving hole 221 and a limiting groove 222, and the bottom has a through groove 223. The through groove 223 and the limiting groove 222 are coaxial to ensure that the positioning rod 24 can pass through smoothly.

[0031] Specifically, the locking block 23 is a cuboid structure with an externally welded limiting ring 231. The limiting ring 231 cooperates with the limiting frame 224 at the upper and lower ends of the moving hole 221 to prevent the locking block 23 from moving excessively. The positioning rod 24 is cylindrical with a baffle 241 welded to the bottom. The baffle 241 cooperates with the extension frame 225 at the top of the limiting groove 222 to limit the downward stroke of the positioning rod 24.

[0032] Specifically, the pull rod 25 is cylindrical, with its bottom welded to the locking block 23 and its top welded to a limiting plate 251. A fixing plate 252 is symmetrically welded below the limiting plate 251. The pull handle 26 has a U-shaped structure with connecting rods 261 extending from both ends. The bottom of the connecting rod 261 is rotatably connected to the top of the positioning rod 24 via a pin, ensuring that the pull handle 26 can rotate freely and that the fixing plate 252 can fix the connecting rod 261.

[0033] Specifically, it is made of the same material as the cable tray body and is fixed to the other end of the cable tray body 1 by bolts. Its size is smaller than that of the plug-in slot 22. A locking groove 31 and a positioning hole 32 are opened on the surface, and their positions correspond to the locking block 23 and the positioning rod 24 of the plug-in slot 22.

[0034] Specifically, the material is the same as the cable tray body, the width is larger than the cable tray body, and the length is cut according to the actual docking requirements. It is connected to the cable tray body by buckles or bolts, which plays a role in dust prevention and corrosion prevention.

[0035] Specifically, verify that the specifications and materials of the two cable tray bodies 1 are consistent, and ensure that the position and size of the plug-in assembly 2 and the plug-in block 3 match. Check the pull rod 25 and lifting handle 26 in the top mounting groove 213 of the first cable tray docking frame 21: pull the pull rod 25 upward to retract the locking block 23 into the moving hole 221; lift the lifting handle 26 upward to retract the positioning rod 24 into the limiting groove 222, ensuring that the initial state meets the requirements. Clean the dust and impurities on the surface of the plug-in groove 22 and the plug-in block 3 to avoid affecting the docking accuracy.

[0036] Specifically, lift each of the two cable tray sections, align the docking frame 21 of the first cable tray with the insertion block 3 of the second cable tray, and fit the docking cup 214 of the docking frame 21 around the front end of the insertion block 3. Using the guiding effect of the docking cup 214, slowly push the second cable tray while simultaneously using the 45° inclined surface at the end of the first cable tray to assist in smoothly sliding the insertion block 3 into the insertion groove 22 until the ends of the two cable tray sections are in contact. Specifically, one worker presses down on the pull handle 26, causing the positioning rod 24 to move downwards along the limiting groove 222. The worker observes whether the bottom of the positioning rod 24 passes through the positioning hole 32 and the through groove 223 in sequence, until the baffle 241 abuts against the extension frame 225. Another worker slowly releases the pull rod 25, allowing the locking block 23 to descend vertically along the moving hole 221 under its own weight, until it locks into the locking groove 31 of the plug-in block 3. At this point, the worker observes whether the limiting ring 231 is in contact with the limiting frame 224 at the lower end of the moving hole 221, ensuring that the locking block 23 is not loose. Rotating the pull handle 26 causes the connecting rod 261 to engage between the fixing plates 252, further securing the positioning rod 24 and preventing it from accidentally lifting.

[0037] Specifically, shake the two connected cable tray sections by hand to check for any looseness; insert a screwdriver into the locking groove 31 and gently push the locking block 23 to confirm that it is firmly fixed; use calipers to measure the exposed length of the positioning rod 24 to ensure that it has penetrated to the bottom of the through groove 223. After confirming that the connection is correct, cover the top of the two cable tray sections with the cover plate 4, align them, and fix them with bolts to ensure that the cover plate 4 fits tightly with the cable tray body, thus completing the entire connection process.

[0038] By using a plug-in and locking method, no drilling or bolting is required, and only two construction workers are needed to complete a section of the connection, which improves installation efficiency.

[0039] In this invention, the positioning rod 24 passes through the positioning hole 32 of the plug-in block 3 and extends to the bottom of the through groove 223, restricting the displacement of the cable tray in the horizontal and vertical directions; the locking block 23 locks into the locking groove 31, further preventing the cable tray from sliding along its length. Testing showed that under horizontal tension and vertical pressure, there was no loosening or displacement at the joint, whereas traditional bolted connections are prone to bolt loosening and cable tray misalignment under the same force. Furthermore, the design of components such as the limiting ring 231 and the baffle 241 prevents excessive movement of the locking block 23 and the positioning rod 24, ensuring long-term structural stability and reliability.

[0040] In this invention, the docking bucket 214 of the docking frame 21 adopts an outwardly expanding structure, which can quickly guide the plug-in block 3 to align with the plug-in slot 22, avoiding the alignment difficulties in traditional docking. The inclined surface design at the end of the cable tray further assists the plug-in block 3 in sliding in, reducing jamming. Even inexperienced construction personnel can quickly master the operation method after simple training, reducing the skill level requirements for construction personnel and reducing component damage caused by operational errors.

[0041] In this invention, the plug-in structure is not limited by the length or specifications of the cable tray, and can connect cable trays of different lengths according to engineering needs. Only the corresponding plug-in block 3 and plug-in slot 22 need to be replaced, making its adaptability far superior to traditional fixed-specification connectors. Furthermore, the cable tray body and plug-in components are fixed by welding or bolts. If a section of the cable tray needs to be replaced or repaired later, simply pull up the pull rod 25 and lift the handle 26 to unlock it, making disassembly convenient without damaging the overall structure and reducing future maintenance costs.

[0042] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing 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

1. A tool-free cable tray, characterized in that: It includes a plug-in assembly (2) disposed at one end of the cable tray body (1), and a matching plug-in block (3) is provided at the other end of the cable tray body (1). The plug-in assembly (2) includes a docking frame (21) fixed to the outer side of the end of the cable tray body (1). The inner walls of the docking frame (21) are provided with plug-in slots (22) that match the plug-in block (3). The plug-in block (3) is inserted into the plug-in slot (22). A locking block (23) and a positioning rod (24) are installed on the top of the plug-in slot (22). The plug-in block (3) is provided with matching locking block (23) and positioning rod (24). The locking block (23) is locked into the locking groove (31) and the positioning hole (32). The positioning rod (24) is inserted into the positioning hole (32) and extends to the bottom of the insertion groove (22). The end of the locking block (23) is connected to a pull rod (25). The top of the positioning rod (24) is also provided with a lifting handle (26). The top of the pull rod (25) and the lifting handle (26) are both placed on the top of the docking frame (21). The top of the docking frame (21) is provided with a pull hole (211) for accommodating the pull rod (25), and a lifting hole (212) for inserting the lifting handle (26) is also provided on one side of the pull hole (211). The pull hole (211) and the lifting hole (212) are both located in the mounting groove (213).

2. The tool-free cable tray according to claim 1, characterized in that: The docking frame (21) has an outwardly expanding docking bucket (214) at the docking end. The plugging block (3) is inserted into the plugging groove (22). The top of the plugging groove (22) has a moving hole (221) for installing the locking block (23). One side of the moving hole (221) has a limiting groove (222) for inserting the positioning rod (24). The bottom of the plugging groove (22) also has a through groove (223) that matches the limiting groove (222). The locking block (23) moves vertically in the moving hole (221). The end of the positioning rod (24) passes through the limiting groove (222) and the positioning hole (32) to the bottom of the through groove (233).

3. The tool-free cable tray according to claim 1, characterized in that: The locking block (23) is provided with a limiting ring (231) on the outside, the positioning rod (24) is provided with a baffle (241) at the bottom, the upper and lower ports of the moving hole (221) are provided with a limiting frame (224) matching the limiting ring (231), and the top slot of the limiting groove (222) is provided with an extension frame (225) to restrict the movement of the baffle (241), that is, the positioning rod (24) retracts into the limiting groove (222).

4. A tool-free cable tray according to claim 1, characterized in that: The pull rod (25) is fixed to the end of the locking block (23) and extends to the top of the pull hole (211). The pull rod (25) has a limiting plate (251) with a size larger than the pull hole (211) on the outer side of the top. The top of the pull rod (25) has a symmetrical fixing plate (252) above the limiting plate (251). The two ends of the lifting handle (26) have connecting rods (261). The bottom of the connecting rod (261) is connected to the top of the positioning rod (24) through a rotating part. The lifting handle (26) rotates as a whole on the top of the positioning rod (24). The fixing plate (252) fixes the connecting rod (261).

5. A tool-free cable tray according to claim 4, characterized in that: The distance between the symmetrical fixing plates (252) matches the size of the connecting rod (261), and the size of the lifting handle (26) is such that it does not affect the rotation of the positioning rod (24) on top of the positioning rod (24) when the positioning rod (24) is fully retracted.

6. A tool-free cable tray according to claim 1, characterized in that: The overall size of the mounting groove (213) is larger than the overall size of the lifting handle (26).

7. A tool-free cable tray according to claim 1, characterized in that: The upper and lower surfaces of the cable tray body (1) located outside the installation position of the plug block (3) are set as inclined surfaces, and the overall size of the plug block (3) is smaller than the internal size of the plug groove (22).

8. A tool-free cable tray according to claim 1, characterized in that: The top of the cable tray body (1) is also covered with a cover plate (4).

9. A method of using the tool-free cable tray installation method according to any one of claims 1-8, characterized in that, include: S1. Align the plug-in assembly (2) at the end of the first cable tray body (1) with the plug-in block (3) at the end of the second cable tray body (1), and check that the pull rod (25) and the lifting handle (26) in the top mounting groove (213) of the docking frame (21) of the first cable tray body (1) are in the initial state. At this time, the locking block (23) retracts into the moving hole (221) of the docking frame (21), and the positioning rod (24) retracts into the limiting groove (222) of the docking frame (21). S2. With the help of the outward expansion of the docking bucket (214) at the docking end of the docking frame (21), the plug-in block (3) of the second cable tray body (1) is inserted into the plug-in groove (22) on both sides of the inner wall of the docking frame (21) of the first cable tray body (1). The inclined surfaces on the upper and lower surfaces of the end of the first cable tray body (1) located outside the installation position of the plug-in block (3) are used to assist the guide so that the plug-in block (3) can smoothly enter the plug-in groove (22). S3. Press down on the pull handle (26) to move the positioning rod (24) down along the limiting groove (222), so that the end of the positioning rod (24) passes through the positioning hole (32) of the plug-in block (3) and extends into the through groove (223) at the bottom of the plug-in groove body (22) until the baffle (241) at the bottom of the positioning rod (24) abuts against the extension frame (225) at the top of the limiting groove (222); release the pull rod (25) so that the locking block (23) moves vertically down along the moving hole (221) under its own gravity and locks into the corresponding locking groove (31) of the plug-in block (3). At this time, the limiting ring (231) outside the locking block (23) cooperates with the limiting frame (224) at the lower end of the moving hole (221) to achieve limiting; S4. Check the matching status of the locking block (23) and the locking groove (31), the positioning rod (24) and the positioning hole (32). After confirming that there are no errors, lay the cover plate (4) on the top of the first cable tray body (1) and the second cable tray body (1) to complete the entire docking process.

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