A retractable conveyor belt equipment for logistics and freight

Abstract

The present invention discloses a retractable conveyor belt device for logistics and freight, which relates to the technical field of cargo transportation, and comprises a U-shaped bracket, wherein an extension device is arranged inside the U-shaped bracket, and the extension device comprises four first transmission rollers. The present invention arranges a second support roller, an extension rod, a magnet, a first installation box, an electromagnetic coil, a second installation box, a photoelectric switch and a fixed plate, and after the extension plate moves to the left, the extension plate no longer blocks the outer surface of the front and rear photoelectric switches, so that the front and rear photoelectric switch signal connectors, the photoelectric switch triggers the electromagnetic coil to connect the alternating current, so that the electromagnetic coil generates a magnetic field, the lower electromagnetic coil drives the upper electromagnetic coil to move upward, the upper electromagnetic coil pushes the magnet upward, so that the second installation box and the extension rod move upward, so that the second support roller supports the upper conveyor belt, so as to avoid the conveyor belt from being broken due to stress, and the friction force received by the conveyor belt during transmission is small, so that the service life of the conveyor belt is long.

Description

Technical Field

[0001] The invention relates to the technical field of cargo transportation, and in particular to a telescopic conveyor belt device for logistics and freight transportation. Background Art

[0002] In order to improve work efficiency and reduce the labor intensity of workers, a logistics conveyor belt is needed. In order to meet the use requirements of different production environments, a retractable conveyor belt transmission device is needed, which can be freely retracted in the length direction and control the length of the conveyor at any time.

[0003] A Chinese patent discloses a retractable conveyor belt, with the publication number CN114572623B, which includes a conveyor belt, a rotary drive mechanism, a retractable belt frame, a linear drive mechanism, a trigger sensor mechanism, a retractable main body, a driven roller assembly and a drop slide mechanism, wherein the retractable main body is slidably arranged at the front end of the retractable belt frame, and the rotary drive mechanism is arranged at the rear end of the retractable belt frame; the linear drive mechanism is arranged on the retractable belt frame and connected to the retractable main body; the driven roller assembly is arranged at the bottom of the retractable belt frame, and the conveyor belt passes through the rotary drive mechanism, the retractable main body and the driven roller assembly in sequence to form a closed loop; the trigger sensor mechanism is arranged on the retractable belt frame to detect whether the material is in place; the drop slide mechanism is arranged at the front end of the retractable main body for the material to slide down. The present invention has a simple structure and can be used in conjunction with a production line, and can place neatly arranged materials neatly and orderly on a fixed racket.

[0004] However, it still includes the following disadvantages: after the device starts the motor, it uses the gear and rack to drive the telescopic body to move to the right, but the device only uses the wear-resistant guide bar to support the conveyor belt, so that the conveyor belt slides and rubs against the wear-resistant guide bar during use, causing the conveyor belt to heat up seriously and reducing the service life of the conveyor belt. To this end, we proposed a telescopic conveyor belt device for logistics and freight to solve this problem. Summary of the invention

[0005] The present invention provides a retractable conveyor belt device for logistics and freight transportation to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A retractable conveyor belt device for logistics and freight transport, comprising a U-shaped bracket, an extension device is arranged inside the U-shaped bracket, the extension device comprises four first transmission rollers, the front and rear end surfaces of the four first transmission rollers are rotatably connected to the inner wall of the U-shaped bracket through a first bearing seat, and an extension part is arranged inside the U-shaped bracket;

[0008] The extension part includes an extension plate, a motor, a rack and a gear. A through hole is opened on the front of the extension plate. The front of the motor is fixedly connected to the back of the U-shaped bracket. The outer surface of the motor output shaft rotates through the back of the U-shaped bracket through the first bearing and extends to the inside of the through hole at the rear of the extension plate.

[0009] The inner wall of the extension plate is rotatably connected to three second transmission rollers via a second bearing seat, and the outer surfaces of the four first transmission rollers are connected to the outer surfaces of the three second transmission rollers via a conveyor belt transmission;

[0010] A support portion is provided below the extension plate;

[0011] The support part includes two electromagnetic coils, a fixing plate, a first installation box, a second installation box and a second support roller. The outer surfaces of the front and rear ends of the second support roller are both provided with extension rods through second bearing rotation sleeves.

[0012] A further improvement of the technical solution of the present invention is that a T-shaped groove is provided on the inner wall of the U-shaped bracket, a T-shaped slider is slidably connected to the inner wall of the T-shaped groove, and the outer surface of the T-shaped slider is fixedly connected to the outer surface of the extension plate. By setting the T-shaped slider, the extension plate can be easily slid left and right.

[0013] A further improvement of the technical solution of the present invention is that a gear is fixedly sleeved on the outer surface of the motor output shaft, a rack is fixedly connected to the inner wall of the extension plate, the outer surface of the gear is meshed with the outer surface of the rack, and the motor is started, the motor drives the gear to rotate, and the gear drives the rack, the extension plate, the first support roller and the second transmission roller to move to the left.

[0014] A further improvement of the technical solution of the present invention lies in that: the outer surface of the fixed plate is fixedly connected to the inner wall of the U-shaped bracket, the bottom surface of the first installation box is fixedly connected to the top surface of the fixed plate, the top surfaces of the first installation box and the second installation box are both opened, the outer surface of the bottom end of the second installation box extends to the interior of the first installation box and is slidably connected to the inner wall of the first installation box, the outer surface of the bottom end of the extension rod extends to the interior of the second installation box and is slidably connected to the inner wall of the second installation box, the first installation box and the second installation box are both provided with a cavity, the electromagnetic coil is provided inside the cavity, the left end surface of the extension rod is provided with a through groove, and a magnet is fixedly connected inside the through groove, and by arranging the first installation box, the second installation box, the extension rod and the second support roller, it is convenient to control the second support roller to move up and down by the electromagnetic coil.

[0015] A further improvement of the technical solution of the present invention is that: the two electromagnetic coils are wound in opposite ways, and when the upper electromagnetic coil is connected to alternating current, the magnetic field generated by the upper electromagnetic coil repels the magnet. By setting two electromagnetic coils and a magnet, the electromagnetic coils are connected to alternating current, so that the electromagnetic coils generate a magnetic field, the lower electromagnetic coil drives the upper electromagnetic coil to move upward, and the upper electromagnetic coil pushes the magnet upward, so that the second support roller supports the upper conveyor belt.

[0016] A further improvement of the technical solution of the present invention lies in that: a first sliding groove is provided on the inner wall of the first installation box, a sliding block is slidably connected to the inner wall of the first sliding groove, the outer surface of the sliding block is fixedly connected to the outer surface of the second installation box, a fixed block is slidably connected to the inner wall of the extension rod, the outer surface of the fixed block is fixedly connected to the inner wall of the second installation box, the second installation box and the inner wall of the bottom end of the first installation box are both fixedly connected to a second spring, the top of the second spring at the bottom is in compression contact with the bottom surface of the second installation box, and the top of the second spring at the top is in compression contact with the bottom surface of the extension rod, by setting the second spring, after the photoelectric switch is blocked, the electromagnetic coil is no longer powered on, and the second spring is used to buffer the fall of the second installation box and the extension rod.

[0017] A further improvement of the technical solution of the present invention lies in that: photoelectric switches are arranged on the front and rear sides of the U-shaped bracket, the outer surface of the photoelectric switch is fixedly penetrated through the outer surface of the U-shaped bracket and extends to the inside of the U-shaped bracket, the outer surface of the photoelectric switch is adapted to the outer surface of the extension plate, and when the front and rear photoelectric switches are turned on, the two electromagnetic coils are connected to alternating current, and the extension plate is set to trigger the photoelectric switch to control whether the electromagnetic coil is energized, so that when the extension plate moves left and right, the second support roller moves up and down in time.

[0018] A further improvement of the technical solution of the present invention is that: a first universal wheel is fixedly connected to the bottom surface of the U-shaped bracket, a card slot is provided on the inner wall of the extension plate, a return tube is arranged inside the extension plate, a mounting hole is provided on the top surface of the return tube, two L-shaped clamping plates are slidably connected to the inner wall of the return tube, the top end of the L-shaped clamping plate extends to the top of the return tube, the outer surface of the L-shaped clamping plate extends to the inside of the card slot and is clamped with the inner wall of the card slot, the end surfaces of the two L-shaped clamping plates on the adjacent sides are fixedly connected with a first spring, the bottom surface of the return tube is fixedly connected with a connecting rod, and the bottom surface of the connecting rod is fixedly connected with a second universal wheel. By providing the second universal wheel, it is convenient to support the left end of the extension plate.

[0019] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0020] 1. The present invention provides a retractable conveyor belt device for logistics and freight transport. By setting a second support roller, an extension rod, a magnet, a first installation box, an electromagnetic coil, a second installation box, a photoelectric switch and a fixed plate, after the extension plate moves to the left, the extension plate no longer blocks the outer surface of the front and rear photoelectric switches, so that the front and rear photoelectric switch signal connectors, the photoelectric switch triggers the electromagnetic coil to connect the alternating current, so that the electromagnetic coil generates a magnetic field, the lower electromagnetic coil drives the upper electromagnetic coil to move upward, the upper electromagnetic coil pushes the magnet upward, so that the second installation box and the extension rod move upward, so that the second support roller supports the upper conveyor belt, so as to avoid the conveyor belt from being broken due to stress, and the friction force on the conveyor belt during transmission is small, so that the service life of the conveyor belt is long;

[0021] 2. The present invention provides a retractable conveyor belt device for logistics and freight, which is provided with a fixed block, a slider and a second spring, and the slider is used to limit the second installation box to prevent the second installation box from being completely moved out of the first installation box, and the fixed block is used to limit the extension rod to prevent the extension rod from being completely moved out of the second installation box. When the extension rod moves to the right, the photoelectric switch is blocked, the electromagnetic coil is no longer powered on, and the second spring is used to buffer the fall of the second installation box and the extension rod;

[0022] 3. The present invention provides a retractable conveyor belt device for logistics and freight, which is provided with an extension plate, a motor, a gear, a rack, a first support roller and a second transmission roller, and the motor is started, the motor drives the gear to rotate, the gear drives the rack to move to the left, and the rack drives the extension plate, the first support roller and the second transmission roller to move to the left;

[0023] 4. The present invention provides a retractable conveyor belt device for logistics and freight. By arranging a return tube, a connecting rod, an L-shaped card plate, a first spring and a first transmission roller, the elastic force of the first spring is utilized to make the outer surface of the L-shaped card plate be stuck in the inside of the card groove on the U-shaped plate, so that the second universal wheel supports the left side of the extension rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a sectional view of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the support part of the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the extension part of the present invention;

[0028] Figure 5 A partial cross-sectional view of the three-dimensional structure of the support portion of the present invention;

[0029] Figure 6 for Figure 5 A magnified view of the structure at center;

[0030] Figure 7 It is a cross-sectional view of the three-dimensional structure of the return tube of the present invention.

[0031] In the figure: 1, U-shaped bracket; 2, extension device; 21, extension part; 22, support part; 201, return tube; 202, connecting rod; 203, L-shaped clamping plate; 204, first spring; 205, first transmission roller; 2101, extension plate; 2102, motor; 2103, gear; 2104, rack; 2105, first support roller; 2106, second transmission roller; 2201, second support roller; 2202, extension rod; 2203, fixed block; 2204, magnet; 2205, slider; 2206, first installation box; 2207, electromagnetic coil; 2208, second spring; 2209, second installation box; 2212, photoelectric switch; 2213, fixed plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0033] See also Figure 1-4 The present invention provides a technical solution: a retractable conveyor belt device for logistics and freight, comprising a U-shaped bracket 1, an extension device 2 is arranged inside the U-shaped bracket 1, the extension device 2 comprises four first transmission rollers 205, the front and rear end surfaces of the four first transmission rollers 205 are rotatably connected to the inner wall of the U-shaped bracket 1 through a first bearing seat, and an extension part 21 is arranged inside the U-shaped bracket 1;

[0034] The extension part 21 includes an extension plate 2101, a motor 2102, a rack 2104 and a gear 2103. A through hole is provided on the front of the extension plate 2101. The front of the motor 2102 is fixedly connected to the back of the U-shaped bracket 1. The outer surface of the output shaft of the motor 2102 rotates through the back of the U-shaped bracket 1 through the first bearing and extends to the inside of the through hole at the rear of the extension plate 2101.

[0035] The inner wall of the extension plate 2101 is rotatably connected with three second transmission rollers 2106 through a second bearing seat, the outer surfaces of the four first transmission rollers 205 are connected with the outer surfaces of the three second transmission rollers 2106 through a conveyor belt transmission, a T-shaped slide groove is provided on the inner wall of the U-shaped bracket 1, a T-shaped slider 2107 is slidably connected to the inner wall of the T-shaped slide groove, and the outer surface of the T-shaped slider 2107 is fixedly connected to the outer surface of the extension plate 2101;

[0036] A gear 2103 is fixedly sleeved on the outer surface of the output shaft of the motor 2102, a rack 2104 is fixedly connected to the inner wall of the extension plate 2101, and the outer surface of the gear 2103 is meshedly connected with the outer surface of the rack 2104. By setting the extension plate 2101, the motor 2102, the gear 2103, the rack 2104, the first support roller 2105 and the second transmission roller 2106, the motor 2102 is started, the motor 2102 drives the gear 2103 to rotate, and the gear 2103 drives the rack 2104 to move leftward, so that the rack 2104 drives the extension plate 2101, the first support roller 2105 and the second transmission roller 2106 to move leftward; Embodiment 2

[0037] See also Figure 1-6 , based on the first embodiment, a support portion 22 is provided below the extension plate 2101;

[0038] The support part 22 includes two electromagnetic coils 2207, a fixed plate 2213, a first installation box 2206, a second installation box 2209 and a second support roller 2201. The outer surfaces of the front and rear ends of the second support roller 2201 are both provided with an extension rod 2202 through a second bearing rotation sleeve. The outer surface of the fixed plate 2213 is fixedly connected to the inner wall of the U-shaped bracket 1. The bottom surface of the first installation box 2206 is fixedly connected to the top surface of the fixed plate 2213. The top surfaces of the first installation box 2206 and the second installation box 2209 are both opened. The outer surface of the bottom end of the second installation box 2209 extends to the inside of the first installation box 2206 and is slidably connected to the inner wall of the first installation box 2206. The outer surface of the bottom end of the extension rod 2202 extends to the inside of the second installation box 2209 and is slidably connected to the inner wall of the second installation box 2209.

[0039] The first installation box 2206 has a first slide groove on its inner wall, and a slider 2205 is slidably connected to the inner wall of the first slide groove. The outer surface of the slider 2205 is fixedly connected to the outer surface of the second installation box 2209. The inner wall of the extension rod 2202 is slidably connected to a fixed block 2203. The outer surface of the fixed block 2203 is fixedly connected to the inner wall of the second installation box 2209. By setting the fixed block 2203, the slider 2205 and the second spring 2208, the slider 2205 is used to limit the second installation box 2209 to prevent the second installation box 2209 from completely moving out of the first installation box 2206. The fixed block 2203 is used to limit the extension rod 2202 to prevent the extension rod 2202 from completely moving out of the second installation box 2209. When the extension rod 2101 moves to the right, the photoelectric switch is blocked, the electromagnetic coil 2207 is no longer powered on, and the second spring 2208 is used to buffer the fall of the second installation box 2209 and the extension rod 2202.

[0040] The second installation box 2209 and the first installation box 2206 are both fixedly connected to the inner wall of the bottom end with a second spring 2208, the top end of the lower second spring 2208 is pressed and contacted with the bottom surface of the second installation box 2209, and the top end of the upper second spring 2208 is pressed and contacted with the bottom surface of the extension rod 2202;

[0041] The first installation box 2206 and the second installation box 2209 are both provided with cavities, the electromagnetic coil 2207 is arranged inside the cavity, the left end surface of the extension rod 2202 is provided with a through slot, the magnet 2204 is fixedly connected inside the through slot, and photoelectric switches 2212 are arranged at the front and rear of the U-shaped bracket 1. The outer surface of the photoelectric switch 2212 is fixedly penetrated through the outer surface of the U-shaped bracket 1 and extends to the inside of the U-shaped bracket 1, and the outer surface of the photoelectric switch 2212 is adapted to the outer surface of the extension plate 2101;

[0042] When the front and rear photoelectric switches 2212 are turned on, the two electromagnetic coils 2207 are connected to alternating current. The winding modes of the two electromagnetic coils 2207 are opposite. When the upper electromagnetic coil 2207 is connected to alternating current, the magnetic field generated by the upper electromagnetic coil 2207 repels the magnet 2204. By setting the second support roller 2201, the extension rod 2202, the magnet 2204, the first installation box 2206, the electromagnetic coil 2207, the second installation box 2209, the photoelectric switch 2212 and the fixing plate 2213, the extension plate 2101 moves to the left so that the extension plate 2101 no longer blocks the front and rear The outer surface of the photoelectric switch 2212 connects the front and rear photoelectric switch 2212 signal connectors. The photoelectric switch triggers the electromagnetic coil 2207 to connect to alternating current, causing the electromagnetic coil 2207 to generate a magnetic field. The lower electromagnetic coil 2207 drives the upper electromagnetic coil 2207 to move upward, and the upper electromagnetic coil 2207 pushes the magnet 2204 upward, causing the second mounting box 2209 and the extension rod 2202 to move upward, causing the second support roller 2201 to support the upper conveyor belt to prevent the conveyor belt from breaking due to force, and reducing the friction force on the conveyor belt during transmission, thereby extending the service life of the conveyor belt. Embodiment 3

[0043] like Figure 1-7 As shown, on the basis of Example 1, the bottom surface of the U-shaped bracket 1 is fixedly connected with a first universal wheel, the inner wall of the extension plate 2101 is provided with a card slot, a return tube 201 is arranged inside the extension plate 2101, a mounting hole is provided on the top surface of the return tube 201, and two L-shaped card plates 203 are slidably connected to the inner wall of the return tube 201, the top end of the L-shaped card plate 203 extends to the top of the return tube 201, and the outer surface of the L-shaped card plate 203 extends to the inside of the card slot and is carded with the inner wall of the card slot;

[0044] The end faces of the two L-shaped clamping plates 203 on the adjacent sides are fixedly connected with the first spring 204, the bottom surface of the return tube 201 is fixedly connected with the connecting rod 202, and the bottom surface of the connecting rod 202 is fixedly connected with the second universal wheel. By setting the return tube 201, the connecting rod 202, the L-shaped clamping plate 203, the first spring 204 and the first transmission roller 205, the elastic force of the first spring 204 is utilized to make the outer surface of the L-shaped clamping plate 203 stuck in the clamping groove on the U-shaped plate 1, so that the second universal wheel supports the left side of the extension rod 2101.

[0045] When in use, start the motor 2102, the output shaft of the motor 2102 drives the gear 2103 to rotate, the gear 2103 drives the rack 2104 to move to the left, the rack 2104 drives the extension plate 2101, the first support roller 2105 and the second drive roller 2106 to move to the left, so that the conveyor belt extends to the left, when the extension plate 2101 moves to the left, the photoelectric switch 2101 is turned on from right to left in sequence, so that the inductor 2207 is powered on, the lower electromagnetic coil 2207 drives the upper electromagnetic coil 2207 to move upward, the upper inductor 2207 drives the second installation box 2209 to move upward, the upper electromagnetic coil 2207 pushes the magnet 2204 upward, the magnet 2204 drives the extension rod 2202 to move upward, the second support roller 2201 of the extension rod 2202 moves upward and supports the upper conveyor belt.

[0046] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A retractable conveyor belt device for logistics and freight transport, comprising a U-shaped bracket (1), characterized in that: An extension device (2) is provided inside the U-shaped bracket (1), the extension device (2) comprises four first transmission rollers (205), the front and rear end surfaces of the four first transmission rollers (205) are rotatably connected to the inner wall of the U-shaped bracket (1) via a first bearing seat, and an extension portion (21) is provided inside the U-shaped bracket (1); The extension portion (21) comprises an extension plate (2101), a motor (2102), a rack (2104) and a gear (2103); a through hole is provided on the front of the extension plate (2101); the front of the motor (2102) is fixedly connected to the back of the U-shaped bracket (1); the outer surface of the output shaft of the motor (2102) rotates through the back of the U-shaped bracket (1) via a first bearing and extends to the interior of the through hole at the rear of the extension plate (2101); The inner wall of the extension plate (2101) is rotatably connected to three second transmission rollers (2106) via a second bearing seat, and the outer surfaces of the four first transmission rollers (205) are connected to the outer surfaces of the three second transmission rollers (2106) via a conveyor belt transmission; A support portion (22) is provided below the extension plate (2101); The support portion (22) comprises two electromagnetic coils (2207), a fixing plate (2213), a first installation box (2206), a second installation box (2209) and a second support roller (2201); the front and rear end outer surfaces of the second support roller (2201) are both provided with extension rods (2202) via second bearing rotation sleeves; The inner wall of the U-shaped bracket (1) is provided with a T-shaped sliding groove, the inner wall of the T-shaped sliding groove is slidably connected with a T-shaped sliding block (2107), and the outer surface of the T-shaped sliding block (2107) is fixedly connected to the outer surface of the extension plate (2101); A gear (2103) is fixedly sleeved on the outer surface of the output shaft of the motor (2102), a rack (2104) is fixedly connected to the inner wall of the extension plate (2101), and the outer surface of the gear (2103) is meshingly connected with the outer surface of the rack (2104); The outer surface of the fixing plate (2213) is fixedly connected to the inner wall of the U-shaped bracket (1); the bottom surface of the first installation box (2206) is fixedly connected to the top surface of the fixing plate (2213); the top surfaces of the first installation box (2206) and the second installation box (2209) are both opened; the outer surface of the bottom end of the second installation box (2209) extends into the interior of the first installation box (2206) and is slidably connected to the inner wall of the first installation box (2206); the outer surface of the bottom end of the extension rod (2202) extends into the interior of the second installation box (2209) and is slidably connected to the inner wall of the second installation box (2209); the first installation box (2206) and the second installation box (2209) are both provided with cavities, the electromagnetic coil (2207) is provided inside the cavities, the left end surface of the extension rod (2202) is provided with a through slot, and a magnet (2204) is fixedly connected inside the through slot; The two electromagnetic coils (2207) are wound in opposite ways, and when the upper electromagnetic coil (2207) is connected to alternating current, the magnetic field generated by the upper electromagnetic coil (2207) repels the magnet (2204); A first sliding groove is provided on the inner wall of the first installation box (2206), and a slider (2205) is slidably connected to the inner wall of the first sliding groove, and the outer surface of the slider (2205) is fixedly connected to the outer surface of the second installation box (2209). A fixed block (2203) is slidably connected to the inner wall of the extension rod (2202), and the outer surface of the fixed block (2203) is fixedly connected to the inner wall of the second installation box (2209). The inner walls of the bottom ends of the second installation box (2209) and the first installation box (2206) are both fixedly connected to a second spring (2208), and the top end of the second spring (2208) is in compression contact with the bottom surface of the second installation box (2209), and the top end of the second spring (2208) is in compression contact with the bottom surface of the extension rod (2202).

2. The retractable conveyor belt equipment for logistics and freight transportation according to claim 1 is characterized in that: Photoelectric switches (2212) are provided at the front and rear of the U-shaped bracket (1); the outer surface of the photoelectric switch (2212) is fixedly passed through the outer surface of the U-shaped bracket (1) and extends into the interior of the U-shaped bracket (1); the outer surface of the photoelectric switch (2212) is matched with the outer surface of the extension plate (2101); when the front and rear photoelectric switches (2212) are turned on, the two electromagnetic coils (2207) are connected to alternating current.

3. The retractable conveyor belt equipment for logistics and freight transportation according to claim 1 is characterized in that: The bottom surface of the U-shaped bracket (1) is fixedly connected to a first universal wheel, the inner wall of the extension plate (2101) is provided with a slot, a return tube (201) is arranged inside the extension plate (2101), the top surface of the return tube (201) is provided with a mounting hole, the inner wall of the return tube (201) is slidably connected to two L-shaped clamping plates (203), the top end of the L-shaped clamping plates (203) extends above the return tube (201), the outer surface of the L-shaped clamping plates (203) extends into the slot and is clamped with the inner wall of the slot, the end surfaces of the two L-shaped clamping plates (203) on the adjacent sides are fixedly connected to a first spring (204), the bottom surface of the return tube (201) is fixedly connected to a connecting rod (202), and the bottom surface of the connecting rod (202) is fixedly connected to a second universal wheel.

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