A stepped cable tray

Abstract

The present invention discloses a stepped cable tray, which relates to the technical field of cable trays. The present invention includes U-shaped side frames. There are two U-shaped side frames, and the U-shaped side frames are symmetrically structured. A rotation mechanism distributed in an array is rotatably installed between the two U-shaped side frames, and an adjustment mechanism for cooperating with the rotation mechanism is provided at the bottom ends of the two U-shaped side frames. Auxiliary mechanisms for cooperating with the rotation mechanism are fixedly installed at both inner ends of the U-shaped side frames. Through the setting and use of the adjustment mechanism, it provides convenience for the adjustment of the distance between the U-shaped side frames, thereby providing convenience for the laying of different numbers of cables, and effectively improving the utilization rate and practicability of the stepped cable tray. Through the setting and use of the rotation mechanism, it can rotate when the cable is pulled, thereby providing convenience for the pulling and laying of the cable, and can avoid the phenomenon of damage due to excessive friction when the cable is pulled, thus ensuring the normal use of the subsequent cable.

Description

Technical Field

[0001] The present invention relates to the technical field of cable trays, and specifically to a ladder-type cable tray. Background Art

[0002] When building a house, in order to make the laid cables standardized and tidy, cable trays are usually used to place the cables. Among them, a cable tray is the full name of a rigid structure system composed of straight sections of trays or ladders, components, hangers, etc., which closely supports the cables.

[0003] However, the currently used ladder-type cable trays still have certain deficiencies:

[0004] 1. The widths of existing ladder-type cable trays are mostly non-adjustable, thus unable to meet the laying requirements of different numbers of cables;

[0005] 2. When the existing ladder-type cable trays are in use, the cables are prone to damage due to excessive frictional force during pulling;

[0006] 3. Existing ladder-type cable trays have the defect of poor cable fixing stability during use.

[0007] In view of the above problems, the inventor proposes a ladder-type cable tray to solve the above problems. Summary of the Invention

[0008] In order to solve the problems that the width of the existing ladder-type cable tray is non-adjustable, the cables are prone to damage due to excessive frictional force during pulling, and there is poor cable fixing stability during use; the purpose of the present invention is to provide a ladder-type cable tray.

[0009] To solve the above technical problems, the present invention adopts the following technical solution: A ladder-type cable tray includes U-shaped side frames. There are two U-shaped side frames, and the U-shaped side frames are symmetrically structured. A rotation mechanism distributed in an array is rotatably installed between the two U-shaped side frames, and an adjustment mechanism cooperating with the rotation mechanism is provided at the bottom ends of the two U-shaped side frames. Auxiliary mechanisms cooperating with the rotation mechanism are fixedly installed at both inner ends of the U-shaped side frames, and positioning mechanisms for cooperation are provided on the auxiliary mechanisms.

[0010] Preferably, the rotating mechanism includes a first rotating rod. A side of the U-shaped side frame close to the adjusting mechanism is provided with a plurality of mounting through holes distributed in an array, and the first rotating rod is rotatably inserted into the mounting through holes. Opposite sides of adjacent first rotating rods are respectively fixedly provided with a first retaining disc and a second retaining disc. A first rotating roller is fixedly installed on a side of the first retaining disc close to the second retaining disc. One end of the first rotating roller away from the first retaining disc is fixedly connected to a second rotating roller. A third rotating roller is fixedly installed on a side of the second retaining disc close to the first retaining disc. A first cavity is formed inside the third rotating roller. The second rotating roller is slidably inserted into the first cavity, and the third rotating roller can contact the first rotating roller.

[0011] Preferably, the adjusting mechanism includes a second rotating rod. The second rotating rod is fixedly installed at the bottom end of the U-shaped side frame and is symmetrically distributed. A first adjusting plate is rotatably sleeved on the second rotating rod. A connecting rotating shaft is rotatably inserted at one end of the first adjusting plate away from the second rotating rod. A second adjusting plate is rotatably sleeved at one end of the connecting rotating shaft away from the U-shaped side frame. An adjusting moving block is fixedly connected between adjacent second adjusting plates. An adjusting screw hole is formed through the adjusting moving block. A double-headed screw is threadedly inserted into the two adjusting screw holes. An anti-slip sheath is fixedly sleeved in the middle of the double-headed screw. A plurality of anti-slip grooves are formed on the outer wall of the anti-slip sheath. Limit retaining rings are fixedly sleeved at both ends of the double-headed screw, and the limit retaining rings can contact the adjusting moving block. First side blocks and second side blocks are respectively fixedly installed at ends of the second rotating rod away from the U-shaped side frame. Both the first side blocks and the second side blocks are symmetrically structured. A guiding cross bar is fixedly installed on a side of the second side block close to the first side block. A guiding sliding hole is formed at one end of the guiding cross bar away from the second side block. A guiding sliding rod is fixedly connected to a side of the first side block close to the second side block. The guiding sliding rod is slidably inserted into the guiding sliding hole. Symmetrically distributed limit sliding blocks are integrally formed at one end of the guiding sliding rod away from the first side block. Symmetrically arranged limit sliding grooves are formed through a side of the guiding cross bar close to the first side block. The limit sliding blocks are slidably inserted into the limit sliding grooves, and the length of the limit sliding grooves is greater than the length of the limit sliding blocks.

[0012] Preferably, the auxiliary mechanism includes mounting fixed blocks which are fixedly installed at the bottom ends of the opposite sides of the U-shaped side frames and are symmetrically distributed. Mounting grooves are formed in the mounting fixed blocks, and a third rotating rod which is used in cooperation with the mounting groove is rotatably inserted into one side of the mounting fixed block. Limiting gears are fixedly sleeved at the opposite ends of adjacent third rotating rods, and the limiting gears are rotatably installed in the mounting grooves. Mounting through holes are formed through the limiting gears, and the third rotating rods are fixedly inserted into the mounting through holes. The opposite ends of adjacent third rotating rods are respectively fixedly installed with a third retaining disk and a fourth retaining disk, and a first auxiliary roller is fixedly installed on one side of the third retaining disk close to the fourth retaining disk. A second cavity is formed inside the first auxiliary roller. A second auxiliary roller is fixedly installed on one side of the fourth retaining disk close to the third retaining disk, and a third auxiliary roller is fixedly connected to one end of the second auxiliary roller away from the fourth retaining disk. The third auxiliary roller is slidably inserted into the second cavity. A mounting bracket is fixedly connected to the outside of the mounting fixed block, and a traction sliding rod is slidably inserted into the mounting bracket. A limiting rack is fixedly connected to the bottom end of the traction sliding rod, and the limiting rack can be engaged with the limiting gear. A return spring is fixedly installed at the top end of the limiting rack. The return spring is movably sleeved on the traction sliding rod, and the end of the return spring away from the limiting rack is fixedly connected to the mounting bracket. A first collar is fixedly sleeved at the top end of the traction sliding rod, and a driving connecting rod is fixedly connected between the two first collars.

[0013] Preferably, the positioning mechanism includes a second collar which is fixedly sleeved on the traction sliding rod, and an L-shaped connecting rod is integrally formed on the second collar. A first rubber clamping plate is fixedly connected to the bottom end of the L-shaped connecting rod close to the third retaining disk, and a second rubber clamping plate is fixedly connected to the bottom end of the L-shaped connecting rod close to the fourth retaining disk. A receiving cavity is formed at one end of the second rubber clamping plate close to the third retaining disk, and the first rubber clamping plate is slidably inserted into the receiving cavity.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. Through the setting and use of the adjusting mechanism, it facilitates the adjustment of the distance between the U-shaped side frames, thus facilitating the laying of different numbers of cables, and effectively improving the utilization rate and practicability of the ladder-type cable tray.

[0016] 2. Through the setting and use of the rotating mechanism, it can rotate when the cable is pulled, thus facilitating the pulling and laying of the cable, and can avoid the phenomenon that the cable is damaged due to excessive friction when pulled, and then ensures the normal use of the subsequent cable.

[0017] 3. Under the coordinated action of the auxiliary mechanism and the positioning mechanism, it facilitates the normal pulling of the cable, and can clamp and fix the laid cable conveniently and quickly, thus ensuring the fixing stability of the cable and improving the laying quality of the cable. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the present invention.

[0020] Figure 2 It is a schematic installation diagram of the adjustment mechanism in the present invention.

[0021] Figure 3 For the present invention Figure 2 It is an enlarged schematic diagram of the structure at position A in the present invention.

[0022] Figure 4 For the present invention Figure 2 It is an enlarged schematic diagram of the structure at position B in the present invention.

[0023] Figure 5 For the present invention Figure 2 It is an enlarged schematic diagram of the structure at position C in the present invention.

[0024] Figure 6 It is a schematic installation diagram of the auxiliary mechanism in the present invention.

[0025] Figure 7 For the present invention Figure 6 It is an enlarged schematic diagram of the structure at position D in the present invention.

[0026] Figure 8 For the present invention Figure 6 It is an enlarged schematic diagram of the structure at position E in the present invention.

[0027] In the figure: 1. U-shaped side frame; 11. Mounting through hole; 2. Rotating mechanism; 21. First rotating rod; 22. First retaining disc; 23. Second retaining disc; 24. First rotating roller; 25. Second rotating roller; 26. Third rotating roller; 27. First cavity; 3. Adjusting mechanism; 31. Second rotating rod; 32. First adjusting plate; 33. Connecting rotating shaft; 34. Second adjusting plate; 35. Adjusting moving block; 36. Adjusting screw hole; 37. Double-headed screw; 38. Limit retaining ring; 39. First side block; 310. Second side block; 311. Guide cross bar; 312. Guide sliding hole; 313. Guide sliding rod; 314. Limit sliding block; 315. Limit sliding groove; 316. Anti-slip sheath; 317. Anti-slip groove; 4. Auxiliary mechanism; 41. Mounting fixed block; 42. Mounting groove; 43. Third rotating rod; 44. Limit gear; 45. Third retaining disc; 46. Fourth retaining disc; 47. First auxiliary roller; 48. Second cavity; 49. Second auxiliary roller; 410. Third auxiliary roller; 411. Mounting bracket; 412. Traction sliding rod; 413. Limit rack; 414. Return spring; 415. First collar; 416. Driving connecting rod; 417. Mounting perforation; 5. Positioning mechanism; 51. Second collar; 52. L-shaped connecting rod; 53. First rubber splint; 54. Second rubber splint; 55. Accommodating cavity. Detailed implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0029] Embodiment: As Figure 1-8 shown, the present invention provides a stepped cable tray, including a U-shaped side frame 1. There are two U-shaped side frames 1, and the U-shaped side frames 1 are symmetrically structured. An array of rotating mechanisms 2 are rotatably installed between the two U-shaped side frames 1, and an adjusting mechanism 3 that cooperates with the rotating mechanism 2 is provided at the bottom ends of the two U-shaped side frames 1. Fixedly installed at both inner ends of the U-shaped side frame 1 are auxiliary mechanisms 4 that cooperate with the rotating mechanism 2, and a positioning mechanism 5 that cooperates with the auxiliary mechanism 4 is provided on the auxiliary mechanism 4.

[0030] The rotating mechanism 2 includes a first rotating rod 21. An array of mounting through holes 11 are formed through one side of the U-shaped side frame 1 close to the adjusting mechanism 3, and the first rotating rod 21 is rotatably inserted into the mounting through holes 11. The arrangement of the mounting through holes 11 ensures the stable rotation of the first rotating rod 21. A first retaining disc 22 and a second retaining disc 23 are respectively and fixedly mounted on the opposite sides of adjacent first rotating rods 21. A first rotating roller 24 is fixedly mounted on the side of the first retaining disc 22 close to the second retaining disc 23. One end of the first rotating roller 24 far from the first retaining disc 22 is fixedly connected to a second rotating roller 25. A third rotating roller 26 is fixedly mounted on the side of the second retaining disc 23 close to the first retaining disc 22. A first cavity 27 is formed inside the third rotating roller 26. The second rotating roller 25 is slidably inserted into the first cavity 27, and the third rotating roller 26 can be in contact with the first rotating roller 24.

[0031] By adopting the above technical solution, during use, the end of the cable to be laid can be sequentially passed through the upper ends of a plurality of first rotating rollers 24, second rotating rollers 25 and third rotating rollers 26 and pulled. At this time, the first rotating rollers 24, second rotating rollers 25 and third rotating rollers 26 will rotate, thus facilitating the pulling of the cable. And when the cable is pulled to the appropriate position, the pulling is stopped.

[0032] The adjusting mechanism 3 includes a second rotating rod 31, which is fixedly installed at the bottom end of the U-shaped side frame 1 and is symmetrically distributed. A first adjusting plate 32 is rotatably sleeved on the second rotating rod 31, and a connecting rotating shaft 33 is rotatably inserted at one end of the first adjusting plate 32 away from the second rotating rod 31. A second adjusting plate 34 is rotatably sleeved at one end of the connecting rotating shaft 33 away from the U-shaped side frame 1. An adjusting moving block 35 is fixedly connected between adjacent second adjusting plates 34. An adjusting screw hole 36 is formed through the adjusting moving block 35, and a double-headed screw 37 is threadedly inserted into the two adjusting screw holes 36. An anti-slip sheath 316 is fixedly sleeved in the middle of the double-headed screw 37, and anti-slip grooves 317 are formed in an array on the outer wall of the anti-slip sheath 316. The cooperation of the anti-slip sheath 316 and the anti-slip grooves 317 facilitates the rotational adjustment of the double-headed screw 37. Limit retaining rings 38 are fixedly sleeved at both ends of the double-headed screw 37, and the limit retaining rings 38 can contact the adjusting moving block 35. First side blocks 39 and second side blocks 310 are respectively fixedly installed at one end of the second rotating rod 31 away from the U-shaped side frame 1, and both the first side blocks 39 and the second side blocks 310 are symmetrically structured. A guiding cross bar 311 is fixedly installed on one side of the second side block 310 close to the first side block 39, and a guiding sliding hole 312 is formed at one end of the guiding cross bar 311 away from the second side block 310. A guiding sliding rod 313 is fixedly connected to one side of the first side block 39 close to the second side block 310, and the guiding sliding rod 313 is slidably inserted into the guiding sliding hole 312. The cooperation of the first side block 39, the second side block 310, the guiding cross bar 311, the guiding sliding hole 312 and the guiding sliding rod 313 guides the movement adjustment of the two U-shaped side frames 1. Symmetrically distributed limit sliding blocks 314 are integrally formed at one end of the guiding sliding rod 313 away from the first side block 39, and symmetrically arranged limit sliding grooves 315 are formed through one end of the guiding cross bar 311 close to the first side block 39. The limit sliding blocks 314 are slidably inserted into the limit sliding grooves 315, and the length of the limit sliding grooves 315 is greater than the length of the limit sliding blocks 314. The cooperation of the limit sliding blocks 314 and the limit sliding grooves 315 limits and guides the relative movement of the guiding cross bar 311 and the guiding sliding rod 313.

[0033] By adopting the above technical solution, during use, the user can hold the anti-slip sheath 316 and rotate it, thereby driving the double-headed screw 37 to rotate, and further driving the two adjusting moving blocks 35 to move in opposite directions. While the adjusting moving block 35 is moving, it will drive one end of the corresponding two second adjusting plates 34 to move, so as to cooperate with the use of the connecting rotating shaft 33 to drive the first adjusting plate 32 to move. During this period, through the cooperation of the guiding cross bar 311, the guiding sliding hole 312 and the guiding sliding rod 313, the first adjusting plate 32 can be rotated, so as to gradually increase the distance between the two U-shaped side frames 1, and stop rotating the anti-slip sheath 316 when the distance between the U-shaped side frames 1 reaches an appropriate size.

[0034] The auxiliary mechanism 4 includes mounting fixed blocks 41 which are fixedly installed at the bottom ends of the opposite sides of the U-shaped side frame 1 and are symmetrically distributed. The mounting fixed blocks 41 are provided with mounting grooves 42, and a third rotating rod 43 which is used in cooperation with the mounting groove 42 is rotatably inserted on one side of the mounting fixed block 41. The opposite ends of the adjacent third rotating rods 43 are fixedly sleeved with limiting gears 44, and the limiting gears 44 are rotatably installed in the mounting grooves 42. The mounting perforations 417 are penetrated through the limiting gears 44, and the third rotating rod 43 is fixedly inserted in the mounting perforations 417. The arrangement of the mounting perforations 417 provides a guarantee for the stable connection between the third rotating rod 43 and the limiting gear 44. The opposite ends of the adjacent third rotating rods 43 are respectively fixedly installed with a third retaining disk 45 and a fourth retaining disk 46, and a first auxiliary roller 47 is fixedly installed on one side of the third retaining disk 45 close to the fourth retaining disk 46. A second cavity 48 is formed inside the first auxiliary roller 47. A second auxiliary roller 49 is fixedly installed on one side of the fourth retaining disk 46 close to the third retaining disk 45, and a third auxiliary roller 410 is fixedly connected to one end of the second auxiliary roller 49 away from the fourth retaining disk 46. The third auxiliary roller 410 is slidably inserted in the second cavity 48. The outer side of the mounting fixed block 41 is fixedly connected with a mounting bracket 411, and a traction sliding rod 412 is slidably inserted on the mounting bracket 411. A limiting rack 413 is fixedly connected to the bottom end of the traction sliding rod 412, and the limiting rack 413 can be meshed with the limiting gear 44. A return spring 414 is fixedly installed at the top end of the limiting rack 413. The return spring 414 is movably sleeved on the traction sliding rod 412, and the end of the return spring 414 away from the limiting rack 413 is fixedly connected with the mounting bracket 411. A first collar 415 is fixedly sleeved at the top end of the traction sliding rod 412, and a driving connecting rod 416 is fixedly connected between the two first collars 415. Through the cooperation of the first collar 415 and the driving connecting rod 416, it is convenient to adjust the movement of the two traction sliding rods 412 on the same side.

[0035] By adopting the above technical solution, during use, the user can simultaneously pull the two driving connecting rods 416 towards the side away from the mounting fixed block 41, thereby driving the corresponding two first collar rings 415 to move, further driving the corresponding traction slide rod 412 to move. While the traction slide rod 412 is moving, it will drive the limit rack 413 to move, thereby squeezing the corresponding return spring 414, and further enabling the limit rack 413 to gradually separate from the corresponding limit gear 44. When the limit rack 413 is completely separated from the corresponding limit gear 44, stop pulling the driving connecting rod 416.

[0036] The positioning mechanism 5 includes a second collar ring 51, which is fixedly sleeved on the traction slide rod 412. An L-shaped connecting rod 52 is integrally formed on the second collar ring 51. The bottom end of the L-shaped connecting rod 52 close to the third retaining disc 45 is fixedly connected to a first rubber splint 53, and the bottom end of the L-shaped connecting rod 52 close to the fourth retaining disc 46 is fixedly connected to a second rubber splint 54. A receiving cavity 55 is formed at one end of the second rubber splint 54 close to the third retaining disc 45, and the first rubber splint 53 is slidably inserted into the receiving cavity 55.

[0037] By adopting the above technical solution, during use, the traction slide rod 412 will drive the second collar ring 51 to move. While the second collar ring 51 is moving, it will drive the corresponding L-shaped connecting rod 52 to move, thereby driving the corresponding first rubber splint 53 and second rubber splint 54 to move. After the cable laying is completed, the limit rack 413 will drive the corresponding traction slide rod 412 to reset, thereby driving the corresponding second collar ring 51 to reset, further driving the corresponding L-shaped connecting rod 52 to reset, and further driving the corresponding first rubber splint 53 and second rubber splint 54 to reset, so that the first rubber splint 53 and the second rubber splint 54 are deformed and the corresponding cable is tightly pressed and fixed on the corresponding first auxiliary roller 47, second auxiliary roller 49 and third auxiliary roller 410.

[0038] Working principle: When in use, the user can adjust the distance between the two U-shaped side frames 1 according to the number of cables to be laid. At this time, the user can hold the anti-slip sheath 316 and rotate it, which can drive the double-headed screw 37 to rotate, and then drive the two adjusting moving blocks 35 to move in opposite directions. While the adjusting moving blocks 35 are moving, they will drive one end of the corresponding two second adjusting plates 34 to move, so as to drive the first adjusting plate 32 to move in cooperation with the use of the connecting rotating shaft 33. During this period, through the cooperation of the guiding cross bar 311, the guiding sliding hole 312 and the guiding sliding rod 313, the first adjusting plate 32 can be rotated, so as to gradually increase the distance between the two U-shaped side frames 1. When the distance between the U-shaped side frames 1 reaches an appropriate size, stop rotating the anti-slip sheath 316. In addition, when the two U-shaped side frames 1 move in opposite directions, the third auxiliary roller 410 will slide along the corresponding second cavity 48, and the second roller 25 will slide along the corresponding first cavity 27;

[0039] Subsequently, the user can fix the two U-shaped side frames 1 on the wall in sequence. Then, the user can simultaneously pull the two driving connecting rods 416 towards the side away from the installation fixed block 41, which can drive the corresponding two first collar rings 415 to move, and then drive the corresponding traction sliding rods 412 to move. While the traction sliding rods 412 are moving, they will drive the second collar ring 51 and the limit rack 413 to move, so as to compress the corresponding return spring 414, and then gradually separate the limit rack 413 from the corresponding limit gear 44. When the limit rack 413 is completely separated from the corresponding limit gear 44, stop pulling the driving connecting rod 416. In addition, while the second collar ring 51 is moving, it will drive the corresponding L-shaped connecting rod 52 to move, so as to drive the corresponding first rubber clamping plate 53 and the second rubber clamping plate 54 to move;

[0040] After that, the user can pass the cable to be laid through the upper ends of the first auxiliary roller 47, the second auxiliary roller 49 and the third auxiliary roller 410 at one end of the U-shaped side frame 1, and then pass the end of the cable to be laid through the upper ends of the plurality of first rollers 24, the second rollers 25 and the third rollers 26 in sequence. Subsequently, pass the end of the cable to be laid through the upper ends of the first auxiliary roller 47, the second auxiliary roller 49 and the third auxiliary roller 410 at the other end of the U-shaped side frame 1 and pull it. At this time, the first auxiliary roller 47, the second auxiliary roller 49, the third auxiliary roller 410, the first roller 24, the second roller 25 and the third roller 26 will rotate, which provides convenience for pulling the cable. When the cable is pulled to the appropriate position, stop pulling;

[0041] Then the user can release the two driving linkages 416 simultaneously. At this time, the return spring 414 will drive the corresponding limit rack 413 to return to its original position, so that the limit rack 413 can mesh with the corresponding limit gear 44 again. During this period, the limit rack 413 will drive the corresponding traction slide bar 412 to return to its original position, so as to drive the corresponding second collar 51 to return to its original position, and further drive the corresponding L-shaped linkage 52 to return to its original position. Furthermore, it can drive the corresponding first rubber splint 53 and the second rubber splint 54 to return to their original positions, so that the first rubber splint 53 and the second rubber splint 54 can be deformed and press the corresponding cable tightly against the corresponding first auxiliary roller 47, the second auxiliary roller 49 and the third auxiliary roller 410.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A stepped cable tray, comprising a U-shaped side frame (1), characterized in that: There are two U-shaped side frames (1) provided, and the U-shaped side frames (1) are of a symmetrical structure. An array of rotating mechanisms (2) is rotatably installed between the two U-shaped side frames (1), and an adjusting mechanism (3) for cooperating with the rotating mechanism (2) is provided at the bottom ends of the two U-shaped side frames (1). Auxiliary mechanisms (4) for cooperating with the rotating mechanism (2) are fixedly installed at both inner ends of the U-shaped side frames (1), and a positioning mechanism (5) for cooperating use is provided on the auxiliary mechanism (4); The rotating mechanism (2) includes a first rotating rod (21). The side of the U-shaped side frame (1) close to the adjusting mechanism (3) is provided with an array of installation through holes (11) penetrating therethrough, and the first rotating rod (21) is rotatably inserted into the installation through holes (11). Opposite sides of adjacent first rotating rods (21) are respectively fixedly installed with a first retaining disc (22) and a second retaining disc (23), and a first rotating roller (24) is fixedly installed on the side of the first retaining disc (22) close to the second retaining disc (23). One end of the first rotating roller (24) far from the first retaining disc (22) is fixedly connected with a second rotating roller (25). A third rotating roller (26) is fixedly installed on the side of the second retaining disc (23) close to the first retaining disc (22), and a first cavity (27) is formed inside the third rotating roller (26). The second rotating roller (25) is slidably inserted into the first cavity (27), and the third rotating roller (26) can be in contact with the first rotating roller (24); The adjusting mechanism (3) includes a second rotating rod (31). The second rotating rod (31) is fixedly installed at the bottom end of the U-shaped side frame (1), and the second rotating rods (31) are symmetrically distributed. A first adjusting plate (32) is rotatably sleeved on the second rotating rod (31), and a connecting rotating shaft (33) is rotatably inserted at one end of the first adjusting plate (32) far from the second rotating rod (31). A second adjusting plate (34) is rotatably sleeved at one end of the connecting rotating shaft (33) far from the U-shaped side frame (1), and an adjusting moving block (35) is fixedly connected between adjacent second adjusting plates (34). An adjusting screw hole (36) is formed through the adjusting moving block (35), and a double-headed screw (37) is threadedly inserted into the two adjusting screw holes (36). Limit retaining rings (38) are fixedly sleeved at both ends of the double-headed screw (37), and the limit retaining rings (38) can be in contact with the adjusting moving block (35).

2. The stepped cable tray according to claim 1, wherein, One end of the second rotating rod (31) far from the U-shaped side frame (1) is respectively fixedly installed with a first side block (39) and a second side block (310), and both the first side block (39) and the second side block (310) are of a symmetrical structure. A guiding cross bar (311) is fixedly installed on the side of the second side block (310) close to the first side block (39), and a guiding sliding hole (312) is formed at one end of the guiding cross bar (311) far from the second side block (310). A guiding sliding rod (313) is fixedly connected to the side of the first side block (39) close to the second side block (310), and the guiding sliding rod (313) is slidably inserted into the guiding sliding hole (312).

3. The stepped cable tray according to claim 2, wherein, One end of the guiding slide bar (313) far away from the first side block (39) is integrally formed with symmetrically distributed limit sliding blocks (314), and symmetrically arranged limit sliding grooves (315) are formed through one end of the guiding cross bar (311) close to the first side block (39). The limit sliding blocks (314) are slidably inserted into the limit sliding grooves (315), and the length of the limit sliding grooves (315) is greater than the length of the limit sliding blocks (314).

4. A stepped cable tray according to claim 1, characterized in that, An anti-slip sheath (316) is fixedly sleeved on the middle of the double-headed screw rod (37), and anti-slip grooves (317) are formed in an array on the outer wall of the anti-slip sheath (316).

5. The stepped cable tray according to claim 1, characterized in that, The auxiliary mechanism (4) includes mounting fixed blocks (41). The mounting fixed blocks (41) are fixedly mounted at the bottom ends of the opposite sides of the U-shaped side frame (1), and the mounting fixed blocks (41) are symmetrically distributed. Mounting grooves (42) are formed in the mounting fixed blocks (41), and a third rotating rod (43) matched with the mounting grooves (42) is rotatably inserted into one side of the mounting fixed blocks (41). Limit gears (44) are fixedly sleeved on the opposite ends of the adjacent third rotating rods (43), and the limit gears (44) are rotatably mounted in the mounting grooves (42). Third retaining disks (45) and fourth retaining disks (46) are respectively fixedly mounted at the opposite ends of the adjacent third rotating rods (43), and a first auxiliary roller (47) is fixedly mounted on one side of the third retaining disk (45) close to the fourth retaining disk (46). A second cavity (48) is formed inside the first auxiliary roller (47). A second auxiliary roller (49) is fixedly mounted on one side of the fourth retaining disk (46) close to the third retaining disk (45), and a third auxiliary roller (410) is fixedly connected to one end of the second auxiliary roller (49) far away from the fourth retaining disk (46). The third auxiliary roller (410) is slidably inserted into the second cavity (48). A mounting bracket (411) is fixedly connected to the outside of the mounting fixed block (41), and a traction slide bar (412) is slidably inserted into the mounting bracket (411). A limit rack (413) is fixedly connected to the bottom end of the traction slide bar (412), and the limit rack (413) can be engaged with the limit gear (44). A return spring (414) is fixedly mounted at the top end of the limit rack (413). The return spring (414) is movably sleeved on the traction slide bar (412), and one end of the return spring (414) far away from the limit rack (413) is fixedly connected to the mounting bracket (411).

6. The stepped cable tray according to claim 5, characterized in that, A first collar (415) is fixedly sleeved on the top end of the traction slide bar (412), and a driving connecting rod (416) is fixedly connected between the two first collars (415).

7. The stepped cable tray according to claim 5, characterized in that, Mounting through holes (417) are formed through the limit gears (44), and the third rotating rods (43) are fixedly inserted into the mounting through holes (417).

8. The stepped cable tray according to claim 5, wherein, The positioning mechanism (5) includes a second collar (51). The second collar (51) is fixedly sleeved on the traction slide rod (412), and an L-shaped connecting rod (52) is integrally formed on the second collar (51). The bottom end of the L-shaped connecting rod (52) close to the third stop disc (45) is fixedly connected to a first rubber clamping plate (53), and the bottom end of the L-shaped connecting rod (52) close to the fourth stop disc (46) is fixedly connected to a second rubber clamping plate (54). A receiving cavity (55) is formed at one end of the second rubber clamping plate (54) close to the third stop disc (45), and the first rubber clamping plate (53) is slidably inserted into the receiving cavity (55).

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