Loading and unloading equipment for road cargo transportation

Abstract

The invention relates to the technical field of loading and unloading equipment, in particular to loading and unloading equipment for road cargo transportation. The invention provides loading and unloading equipment for road cargo transportation, which comprises a moving frame, symmetrically distributed mounting seats are slidably connected to the moving frame, a plurality of sections of guide pieces are rotatably connected to the symmetrically distributed mounting seats, and a plurality of sections of electric push rods are rotatably connected to fixed parts of the symmetrically distributed guide pieces. Telescopic pieces are connected between the multiple sections of electric push rods which are symmetrically distributed, and the sides, away from each other, of the multiple sections of guide pieces are fixedly connected with fixed guide rails. According to the cement pipeline conveying device, cement pipelines clamped in gaps can be continuously dragged to the multi-section electric push rod through cooperation of the sliding wedge-shaped block and the first guide frame, then the pipelines are slowly and continuously conveyed through cooperation of the guide piece, the blocking piece, the pull rope, the extension spring and the like, the pipeline quality is guaranteed, and the discharging efficiency of workers can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of loading and unloading equipment, and in particular to a loading and unloading equipment for road freight transportation. Background Art

[0002] Cement pipes are commonly used in the drainage systems of buildings, such as rainwater discharge and sewage discharge, as well as urban drainage systems. Their large diameter and good sealing performance can effectively prevent urban waterlogging. With their characteristics of being strong, durable, corrosion-resistant, and having high compressive strength, cement pipes have long and stably undertaken the transportation tasks of various media and are essential building materials in modern urban construction.

[0003] For example, the patent with the authorized publication number of CN213264786U and the publication date of May 25, 2021 discloses a cement pipe handling device, including a fixed support and a trolley. The fixed support includes a placement platform and a discharge platform. The placement platform is fixedly connected to the discharge platform. Tracks are provided on both sides of the placement platform and the discharge platform. Pulleys are arranged in the tracks. A blocking member is rotatably arranged on the pulleys. A round hole is provided through one end of the blocking member. A bearing is arranged in the round hole. A support rod is fixedly arranged on the inner ring of the bearing. A rubber pad is arranged at the end of the support rod. A connecting rod is arranged between the pulleys. A driven wheel is arranged on the connecting rod. A first automatic wire rewinder is arranged on the placement platform corresponding to the driven wheel, and a second automatic wire rewinder is arranged at the lower end of the discharge platform corresponding to the driven wheel. The first automatic wire rewinder and the second automatic wire rewinder are cooperatively connected to the driven wheel. However, when the above solution is actually used, there are still certain deficiencies. For example, during the use process, it is necessary to wait for the support rod to completely withdraw from the cement pipe before unloading the next cement pipe. This step results in non - continuous unloading, and the process of the support rod entering and exiting the pipe lacks an automated auxiliary mechanism, relying on frequent operations by workers, increasing the labor intensity and possibly affecting the safety of operations, thus reducing the unloading efficiency.

[0004] Based on the above situation, the present invention proposes a loading and unloading equipment for road freight transportation. Summary of the Invention

[0005] In order to overcome the drawback that it is necessary to wait for the support rod to completely withdraw from the cement pipe before unloading the next cement pipe, which results in non - continuous unloading and thus reduces the overall working efficiency, the present invention proposes a loading and unloading equipment for road freight transportation.

[0006] The technical implementation solution of the present invention is: a loading and unloading device for road freight transportation, including a moving frame, on which symmetrically distributed mounting seats are slidably connected, on the symmetrically distributed mounting seats are rotatably connected multi-section guiding members, on the fixed parts of the symmetrically distributed multi-section guiding members are rotatably connected multi-section electric push rods, between the symmetrically distributed multi-section electric push rods is connected a telescopic member, on the mutually remote sides of the multi-section guiding members are fixedly connected fixed guide rails, on the symmetrically distributed fixed guide rails are slidably connected extension guide rails, on the symmetrically distributed fixed guide rails are slidably connected guiding members, on the mutually remote sides of the guiding members are slidably connected blocking members, between the blocking members and the adjacent guiding members are connected telescopic springs, the symmetrically distributed telescopic springs are all wound around the adjacent guiding members, on the symmetrically distributed extension guide rails are fixedly connected fixed wedge blocks, the fixed wedge blocks and the adjacent blocking members are all in extrusion fit, on the symmetrically distributed blocking members are rotatably connected evenly distributed rolling members, between the guiding members and the adjacent fixed guide rails are connected tension springs, on the symmetrically distributed fixed guide rails are fixedly connected mounting frames, on the symmetrically distributed mounting frames are rotatably connected winding devices, on the symmetrically distributed winding devices are wound ropes, the movable ends of the ropes all pass through the adjacent fixed guide rails and are connected to the guiding members, the tension springs are all wound around the adjacent ropes, and on the symmetrically distributed mounting frames are provided buffer components.

[0007] More preferably, the buffer component includes rotating members, on the symmetrically distributed winding devices are fixedly connected rotating members, on the symmetrically distributed mounting frames are fixedly connected air cylinders, on the symmetrically distributed air cylinders are opened small holes for air inlet and outlet, on the piston parts of the symmetrically distributed air cylinders are rotatably connected connecting rods, and the connecting rods are also rotatably connected to the adjacent rotating members.

[0008] More preferably, it further includes a dragging-out mechanism for dragging the cement pipe stuck in the gap onto the multi-section electric push rods. The dragging-out mechanism is arranged on the multi-section electric push rods. The dragging-out mechanism includes fixing members, on the telescopic parts of the symmetrically distributed multi-section electric push rods are placed fixing members, on the telescopic parts of the multi-section electric push rods and the fixing members are opened symmetrically distributed insertion holes, between the fixing members and the adjacent telescopic parts of the multi-section electric push rods are slidably connected symmetrically distributed pins, on the symmetrically distributed fixing members are installed linear electric push rods, on the telescopic parts of the symmetrically distributed linear electric push rods are fixedly connected first guiding frames, the first guiding frames and the adjacent fixing members are slidably connected, on the symmetrically distributed first guiding frames are slidably connected sliding wedge blocks, between the sliding wedge blocks and the adjacent first guiding frames are connected return springs, the return springs are all wound around the adjacent sliding wedge blocks, and on the symmetrically distributed sliding wedge blocks are provided rolling components.

[0009] More preferably, the rolling assembly includes a fixed frame, the symmetrically distributed sliding wedge blocks are all fixedly connected to the fixed frame, and the symmetrically distributed fixed frames are all rotatably connected to rollers, which are used to reduce the friction between the sliding wedge blocks and the inner wall of the cement pipe.

[0010] More preferably, it also includes a toggle mechanism for withdrawing the sliding wedge block from the cement pipe, the toggle mechanism is arranged on the fixed part, the toggle mechanism includes a rotating shaft, the symmetrically distributed fixed parts are rotatably connected to the rotating shafts, the sides of the rotating shafts that are close to each other are fixed with toggle plates, the sides of the rotating shafts that are away from each other are fixed with gears, the symmetrically distributed first guide frames are fixed with connecting parts, and the symmetrically distributed connecting parts are fixed with racks.

[0011] More preferably, the rack meshes with adjacent gears.

[0012] More preferably, it also includes an adjustment mechanism for adjusting the distance between the two movable frames according to the length of the cement pipe. The adjustment mechanism is arranged on the movable frame, and the adjustment mechanism includes a mounting block. A symmetrically distributed mounting block is fixedly connected to one side of the movable frame close to the mounting seat, and the symmetrically distributed mounting blocks are located on the outside of the mounting seat. Bidirectional screws are rotatably connected between the symmetrically distributed mounting blocks, and the bidirectional screws are threadedly connected to the symmetrically distributed mounting seats.

[0013] More preferably, it also includes a correction mechanism for preventing the cement pipe from deviating when rolling along the multi-section guide members. The correction mechanism is arranged on the symmetrically distributed blocking members. The correction mechanism includes a U-shaped sliding member. The symmetrically distributed blocking members are all slidably connected with the U-shaped sliding member. The sides of the blocking members that are away from each other are fixedly connected with a second guide frame. The symmetrically distributed second guide frames are all slidably connected with a centering member. A force storage spring is connected between the centering member and the adjacent second guide frame. The symmetrically distributed force storage springs are all wound around the adjacent second guide frame.

[0014] More preferably, the U-shaped sliding member is press-fitted with the adjacent centering member.

[0015] More preferably, the bottom of the mobile frame is equipped with symmetrically distributed wheels.

[0016] The present invention has the following advantages: the present invention first utilizes the cooperation between the sliding wedge block and the first guide frame to continuously drag the cement pipe stuck in the gap onto the multi-section electric push rod, and then cooperates with the guide member, the blocking member, the pull rope, the tension spring, the air cylinder, and the fixed wedge block to achieve slow and continuous transportation of the pipe, which not only ensures the quality of the pipe, but also improves the unloading efficiency of the workers.

[0017] The present invention uses the cooperation of the rack and the gear to allow the toggle plate to toggle the pipe pressed thereon, so that the sliding wedge block automatically withdraws from the pipe, eliminating the need for workers to frequently manually operate the sliding wedge block. This not only improves the unloading efficiency, but also reduces the risk of human error.

[0018] The present invention firstly uses a bidirectional screw to adjust according to the length of the pipeline, so that pipelines of different lengths can be unloaded, thereby improving the adaptability of the device, and then the pipeline is corrected by a centering piece to avoid the pipeline from shifting during the unloading process, ensuring that the pipeline can accurately roll from the multi-section guide parts to the ground without leaking out from between the multi-section guide parts and causing breakage, thereby improving the stability and safety of unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0020] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of components such as a multi-section electric push rod, a fixed guide rail and a guide member of the present invention.

[0022] Figure 4 It is a sectional view of the three-dimensional structure of the pull rope, tension spring, reel and other components of the present invention.

[0023] Figure 5 It is a sectional view of the three-dimensional structure of the multi-section guide, fixed guide rail and extended guide rail components of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the guide member, the blocking member and the telescopic spring component of the present invention.

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the fixing member, the linear electric push rod, the first guide frame and other components of the present invention.

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the sliding wedge block, the fixing frame and the roller of the present invention.

[0027] Figure 9 It is a sectional view of the three-dimensional structure of the fixing part, multi-section electric push rod, latch and other components of the present invention.

[0028] Figure 10 It is a three-dimensional structural schematic diagram of the components such as the rotating shaft, the toggle plate and the gears of the present invention.

[0029] Figure 11 It is a schematic diagram of the three-dimensional structure of components such as gears, connectors and racks of the present invention.

[0030] Figure 12 It is a schematic diagram of the three-dimensional structure of components such as the bidirectional screw, the mounting block and the centering piece of the present invention.

[0031] Figure 13 It is a schematic diagram of the three-dimensional structure of the U-shaped sliding member, the force storage spring, the second guide frame and other components of the present invention.

[0032] In the figure: 1_mobile frame, 11_multi-section guide, 1101_mounting seat, 12_multi-section electric push rod, 121_telescopic member, 13_fixed guide rail, 131_extension guide rail, 14_guide member, 141_blocking member, 142_telescopic spring, 143_fixed wedge block, 15_rolling member, 16_pull rope, 17_tension spring, 18_retractor, 181_mounting frame, 19_rotating member, 110_connecting rod, 111_air cylinder, 2_fixing part, 21_linear electric push rod, 211_latch, 22_first guide frame, 23_sliding wedge block, 24_fixing frame, 25_roller, 26_reset spring, 3_rotating shaft, 31_sliding plate, 32_gear, 33_connecting part, 34_rack, 4_bidirectional screw, 401_mounting block, 41_U-shaped sliding part, 42_centering part, 43_force storage spring, 44_second guide frame. DETAILED DESCRIPTION

[0033] First of all, it should be pointed out that in the different described embodiments, the same parts are provided with the same reference numerals or the same component names, wherein the disclosure contained in the entire description can be transferred to the same parts with the same reference numerals or the same component names. Selected positional descriptions in the description, such as top, bottom, lateral, etc., also refer to the directly described and shown figures and are transferred to the new positions in the case of a change in position.

[0034] Example 1: A loading and unloading device for road freight transportation, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in the figure, it includes a moving frame 1. Wheels are symmetrically installed at the front and back on both left and right sides of the bottom of the moving frame 1. Mounting seats 1101 are symmetrically and slidably connected to the moving frame 1. Multi-joint guiding members 11 are rotatably connected to both of the two mounting seats 1101. Multi-joint electric push rods 12 are rotatably connected to the fixed parts of the two multi-joint guiding members 11. A telescopic member 121 is connected between the two multi-joint electric push rods 12. Fixed guide rails 13 are fixedly connected to the sides of the multi-joint guiding members 11 that are away from each other. Extension guide rails 131 are slidably connected to the front parts of the two fixed guide rails 13. Guide members 14 are slidably connected to both of the two fixed guide rails 13. Blocking members 141 are slidably connected to the sides of the guide members 14 that are away from each other. Telescopic springs 142 are connected between the blocking members 141 and the adjacent guide members 14. Both of the two telescopic springs 142 are wound around the adjacent guide members 14. Fixed wedge-shaped blocks 143 are fixedly connected to the front parts of the two extension guide rails 131. The fixed wedge-shaped blocks 143 and the adjacent blocking members 141 are in extrusion fit. Three evenly distributed rolling members 15 are rotatably connected to both of the two blocking members 141. Tensile springs 17 are connected between the guide members 14 and the adjacent fixed guide rails 13. Mounting frames 181 are fixedly connected to the rear sides of the two fixed guide rails 13. Rewinders 18 are rotatably connected to the front sides of the two mounting frames 181. Pulling ropes 16 are wound around both of the two rewinders 18. The movable ends of the pulling ropes 16 pass through the adjacent fixed guide rails 13 and are connected to the guide members 14. The tensile springs 17 are wound around the adjacent pulling ropes 16. Buffer components are provided on both of the two mounting frames 181.

[0035] As Figure 3 and Figure 4 shown, the buffer component includes a rotating member 19. Rotating members 19 are fixedly connected to both of the two rewinders 18. Air cylinders 111 are fixedly connected to the rear sides of the two mounting frames 181. Small holes for air inlet and outlet are opened on both of the two air cylinders 111. Connecting rods 110 are rotatably connected to the piston parts of the two air cylinders 111. The connecting rods 110 are also rotatably connected to the adjacent rotating members 19.

[0036] As Figure 7 、 Figure 8 and Figure 9As shown in the figure, it further includes a pulling-out mechanism for pulling the cement pipe stuck in the gap onto the multi-stage electric push rod 12. The pulling-out mechanism is arranged on the multi-stage electric push rod 12. The pulling-out mechanism includes a fixing member 2. Fixing members 2 are placed on the telescopic parts of the two multi-stage electric push rods 12. Symmetrically distributed insertion holes are provided on the telescopic parts of the multi-stage electric push rod 12 and the fixing member 2. Two insertion pins 211 are slidably connected between the fixing member 2 and the telescopic part of the adjacent multi-stage electric push rod 12. Linear electric push rods 21 are installed on one side of the two fixing members 2 away from each other. The telescopic parts of the two linear electric push rods 21 are fixedly connected with a first guide frame 22. The first guide frame 22 is slidably connected with the adjacent fixing member 2. Sliding wedge blocks 23 are slidably connected to the two first guide frames 22. A return spring 26 is connected between the sliding wedge block 23 and the adjacent first guide frame 22. The return springs 26 are wound around the adjacent sliding wedge blocks 23. Rolling components are provided on the two sliding wedge blocks 23.

[0037] As Figure 8 shown in the figure, the rolling component includes a fixing frame 24. Fixing frames 24 are fixedly connected to the front sides of the two sliding wedge blocks 23. A roller 25 is rotatably connected to the two fixing frames 24. The roller 25 is used to reduce the friction between the sliding wedge block 23 and the inner wall of the cement pipe.

[0038] When using this device, first push the device backward to the tail of the transport vehicle to be loaded. The multi-stage electric push rod 12 will face the tail of the transport vehicle. Then, according to the number of layers of cement pipes in the vehicle, rotate the multi-stage guide member 11 to drive the multi-stage electric push rod 12 to be flush with the top of the next layer of cement pipes. Subsequently, pull the multi-stage guide member 11 and the extension guide rail 131 downward and to the right. The multi-stage guide member 11 and the extension guide rail 131 will extend towards the ground and abut against the ground. At this time, the multi-stage guide member 11 is similar to a ladder placed on the cement pipe. Continue to push the moving frame 1 backward, thereby driving the multi-stage guide member 11, the multi-stage electric push rod 12, the fixing member 2, the sliding wedge block 23, etc. to move backward.

[0039] When the backward - moving sliding wedge block 23 contacts the top - most cement pipe, the outer wall of the cement pipe will resist against the inclined surface of the sliding wedge block 23. As the moving frame 1 continues to move backward, the sliding wedge block 23 will move outward and separate, and the return spring 26 will deform. When the distance between the two sliding wedge blocks 23 is slightly larger than the length of the cement pipe, the sliding wedge block 23 will cross over the pipe wall of the cement pipe, and under the elastic action of the return spring 26, the sliding wedge block 23 will move inward to reset. At this time, the two sliding wedge blocks 23 will insert into the cement pipe from the left and right sides. Then, control the linear electric push rod 21 to drive the first guide frame 22 to move forward, thereby driving the sliding wedge block 23 and the roller 25 to move forward until they contact the inner wall of the pipe. The roller 25 will roll on the fixed frame 24. As the sliding wedge block 23 continues to move forward, the sliding wedge block 23 will hook the cement pipe and move forward together, and the cement pipe will roll onto the multi - joint electric push rod 12.

[0040] At this time, the sliding wedge block 23 can be pulled outward to make it withdraw from the pipe. Subsequently, control the multi - joint electric push rod 12 to drive the fixing part 2 and the sliding wedge block 23 to continue moving backward. The backward - moving sliding wedge block 23 will contact the outer wall of the next pipe. According to the previous steps, the sliding wedge block 23 will insert into the cement pipe and pull it forward, and the cement pipe will continue to roll onto the multi - joint electric push rod 12, and it will push the previous pipe forward. And so on, continue to pull the sliding wedge block 23 out of the pipe and control it to move backward to hook the next pipe. The previous pipe will roll along the multi - joint electric push rod 12 to the multi - joint guide part 11 and contact the blocking part 141 under the action of its own gravity. The pipe will roll forward and downward along the multi - joint guide part 11. At the same time, the pipe will drive the blocking part 141 to move forward and downward together, and the guide part 14 will also move forward and downward. The rolling part 15 will rotate, the tension spring 17 will be stretched, the reel 18 will rotate to release the pull rope 16, and the reel 18 will drive the connecting rod 110 to rotate through the rotating part 19, so that the piston part of the air cylinder 111 makes a reciprocating movement back and forth. The air inlet and outlet small holes of the air cylinder 111 will continuously and slowly intake and exhaust air. Therefore, the speed of the reel 18 releasing the pull rope 16 is slowed down, that is, the speed of the blocking part 141 moving downward is also slowed down, thus achieving the slow transportation of the pipe.

[0041] When the blocking member 141 moving forward and downward contacts the fixed wedge block 143, the fixed wedge block 143 will resist the blocking member 141 to move it outward, the telescopic spring 142 will be deformed, the blocking member 141 moving outward will be separated from the pipeline, and the pipeline will roll from the lower end of the multi-section guide member 11 to the ground, and the uppermost pipeline has completed unloading. Then, under the elastic action of the telescopic spring 142 and the tension spring 17, the blocking member 141 first moves inward to reset, and the guide member 14 drives the blocking member 141 to move backward and upward to reset, and the reel 18 will automatically reel the pull rope 16, and the air inlet and outlet holes of the air cylinder 111 will be opened. The air will continue to slowly flow in and out, and the guide member 14 and the blocking member 141 will slow down and move backward and upward to reset, and so on, and continue to unload the pipes of the next layer until all the pipes on the transport vehicle are unloaded. In summary, the sliding wedge block 23 and the first guide frame 22 are first used to cooperate with each other to continuously drag the cement pipe stuck in the gap onto the multi-section electric push rod 12, and then the guide member 14, the blocking member 141, the pull rope 16, the tension spring 17, the air cylinder 111, and the fixed wedge block 143 cooperate with each other to achieve slow and continuous transportation of the pipe, which not only ensures the quality of the pipe, but also improves the unloading efficiency of the workers.

[0042] Embodiment 2: Based on embodiment 1, Figure 10 and Figure 11 As shown, it also includes a toggle mechanism for withdrawing the sliding wedge block 23 from the cement pipe. The toggle mechanism is arranged on the fixed member 2. The toggle mechanism includes a rotating shaft 3. The two fixed members 2 are rotatably connected to the rotating shaft 3. The sides of the rotating shafts 3 that are close to each other are fixedly connected to toggle plates 31, and the sides of the rotating shafts 3 that are away from each other are fixedly connected to gears 32. Connecting members 33 are fixedly connected to the two first guide frames 22, and racks 34 are fixedly connected to the two connecting members 33. The racks 34 are meshed with the adjacent gears 32.

[0043] When the linear electric push rod 21 drives the first guide frame 22 to move forward, the sliding wedge block 23 will hook the cement pipe and move forward together. The cement pipe will roll onto the multi-section electric push rod 12 and press on the toggle plate 31, and the first guide frame 22 will also drive the connecting piece 33 and the rack 34 to move forward. When the currently moving rack 34 contacts the gear 32, the rack 34 will drive the rotating shaft 3 to rotate forward through the gear 32, thereby driving the toggle plate 31 to rotate forward. The forward rotating toggle plate 31 toggles the pipe forward from the bottom of the pipe, and the pipe will have a tendency to roll forward relative to the sliding wedge block 23, and the sliding wedge block 23 will move the pipe forward. The block 23 will press against the inner wall of the pipe, and as the pipe continues to roll forward, the sliding wedge block 23 will move outward until it exits the pipe, and the reset spring 26 will be deformed. When the pipe passes over the sliding wedge block 23, the sliding wedge block 23 will move inward and reset under the elastic action of the reset spring 26. In summary, through the cooperation of the rack 34 and the gear 32, the toggle plate 31 will toggle the pipe pressed thereon, so that the sliding wedge block 23 automatically exits the pipe, eliminating the need for the staff to frequently manually operate the sliding wedge block 23, which not only improves the unloading efficiency, but also reduces the risk of human errors.

[0044] like Figure 12 As shown, it also includes an adjustment mechanism for adjusting the distance between the two mobile frames 1 according to the length of the cement pipe. The adjustment mechanism is arranged on the mobile frame 1, and the adjustment mechanism includes a mounting block 401. A symmetrically distributed mounting block 401 is fixedly connected to one side of the mobile frame 1 close to the mounting seat 1101. The two mounting blocks 401 are located on the outside of the two mounting seats 1101. A bidirectional screw 4 is rotatably connected between the two mounting blocks 401, and the bidirectional screw 4 is threadedly connected to the two mounting seats 1101.

[0045] like Figure 12 and Figure 13 As shown, it also includes a correction mechanism for preventing the cement pipe from deviating when rolling along the multi-section guide member 11. The correction mechanism is arranged on the symmetrically distributed blocking members 141. The correction mechanism includes a U-shaped sliding member 41. The two blocking members 141 are slidably connected with the U-shaped sliding member 41. The sides of the blocking members 141 that are away from each other are fixedly connected with a second guide frame 44. The two second guide frames 44 are slidably connected with a centering member 42. A force storage spring 43 is connected between the centering member 42 and the adjacent second guide frame 44. The two force storage springs 43 are both wound around the adjacent second guide frame 44. The U-shaped sliding member 41 and the adjacent centering member 42 are squeezed together.

[0046] When using this device, the staff first adjusts the distance between the two multi-section guiding members 11 according to the length of the pipeline. The specific operation is as follows: Rotate the bidirectional screw rod 4, thereby driving the mounting seat 1101 to move inward and outward, and then driving the multi-section guiding members 11 and the multi-section electric push rods 12 to move inward and outward. The telescopic member 121 either extends or contracts. When the distance between the two multi-section guiding members 11 is adjusted, stop rotating the bidirectional screw rod 4. When the pipeline rolls from the multi-section electric push rod 12 onto the multi-section guiding member 11 and contacts the blocking member 141, the outer wall of the pipeline will also push the U-shaped sliding member 41 forward. The U-shaped sliding member 41 will move forward and squeeze the centering member 42, causing the centering member 42 to move inward and approach each other. The energy storage spring 43 deforms. The centering member 42 that moves inward and approaches each other will approach the left and right sides of the pipeline, preventing the pipeline from shifting during the downward rolling process. When the pipeline rolls from the multi-section guiding member 11 to the ground, under the elastic action of the energy storage spring 43, the centering member 42 moves outward to reset, thereby driving the U-shaped sliding member 41 to move forward and reset. To sum up, first, the bidirectional screw rod 4 can be adjusted according to the length of the pipeline, so that pipelines of different lengths can be unloaded, improving the adaptability of the device. Then, the centering member 42 corrects the deviation of the pipeline, preventing the pipeline from shifting during the unloading process, ensuring that the pipeline can accurately roll from the multi-section guiding member 11 to the ground without leaking between the multi-section guiding members 11 and causing cracking, and improving the stability and safety of unloading.

[0047] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A loading and unloading device for road freight transportation, comprising a moving frame (1), on which symmetrically distributed mounting seats (1101) are slidably connected, multi-section guiding members (11) are rotatably connected to the symmetrically distributed mounting seats (1101), multi-section electric push rods (12) are rotatably connected to the fixed parts of the symmetrically distributed multi-section guiding members (11), a telescopic member (121) is connected between the symmetrically distributed multi-section electric push rods (12), and it is characterized in that, The invention also comprises a fixed guide rail (13), the side of the multi-section guide members (11) away from each other is fixedly connected with the fixed guide rail (13), the symmetrically distributed fixed guide rails (13) are slidably connected with extension guide rails (131), the symmetrically distributed fixed guide rails (13) are slidably connected with guide members (14), the side of the guide members (14) away from each other is slidably connected with blocking members (141), a telescopic spring (142) is connected between the blocking member (141) and the adjacent guide member (14), the symmetrically distributed telescopic springs (142) are wound around the adjacent guide member (14), the symmetrically distributed extension guide rails (131) are fixedly connected with fixed wedge blocks (143), the fixed wedge blocks (143) and the adjacent The blocking members (141) are all squeeze-fitted, and the symmetrically distributed blocking members (141) are all rotatably connected to the evenly distributed rolling members (15), and the guide members (14) and the adjacent fixed guide rails (13) are all connected with tension springs (17), and the symmetrically distributed fixed guide rails (13) are all fixedly connected with mounting frames (181), and the symmetrically distributed mounting frames (181) are all rotatably connected to the reels (18), and the symmetrically distributed reels (18) are all wound with pull ropes (16), and the movable ends of the pull ropes (16) pass through the adjacent fixed guide rails (13) and are connected to the guide members (14), and the tension springs (17) are all wound around the adjacent pull ropes (16), and the symmetrically distributed mounting frames (181) are all provided with buffer components.

2. The loading and unloading equipment for road freight transportation according to claim 1, characterized in that, The buffer assembly includes a rotating member (19), the rotating members (19) are fixedly connected to the symmetrically distributed reels (18), the air cylinders (111) are fixedly connected to the symmetrically distributed mounting frames (181), the symmetrically distributed air cylinders (111) are provided with small holes for air inlet and outlet, the piston parts of the symmetrically distributed air cylinders (111) are rotatably connected to connecting rods (110), and the connecting rods (110) are also rotatably connected to the adjacent rotating member (19).

3. The loading and unloading equipment for road freight transportation according to claim 2, characterized in that, The utility model also comprises a pulling-out mechanism for pulling the cement pipe stuck in the gap onto the multi-section electric push rod (12), the pulling-out mechanism being arranged on the multi-section electric push rod (12), the pulling-out mechanism comprising a fixing member (2), the fixing members (2) being placed on the telescopic parts of the symmetrically distributed multi-section electric push rods (12), the telescopic parts of the multi-section electric push rods (12) and the fixing members (2) being provided with symmetrically distributed plug holes, the fixing members (2) and the telescopic parts of the adjacent multi-section electric push rods (12) being slidably connected with symmetrically distributed latches (211), the symmetrically distributed fixing members (2) being provided with a plurality of latches (211) on the telescopic parts of the adjacent multi-section electric push rods (12), and the fixing members (2) being provided with a plurality of latches (211) on the telescopic parts of the adjacent multi-section electric push rods (12). A linear electric push rod (21) is installed on each of the linear electric push rods (21), and the telescopic parts of the symmetrically distributed linear electric push rods (21) are fixedly connected to a first guide frame (22), and the first guide frame (22) is slidably connected to an adjacent fixed member (2), and a sliding wedge block (23) is slidably connected to the symmetrically distributed first guide frames (22), and a return spring (26) is connected between the sliding wedge block (23) and the adjacent first guide frame (22), and the return spring (26) is wound around the adjacent sliding wedge block (23), and a rolling assembly is provided on the symmetrically distributed sliding wedge blocks (23).

4. The loading and unloading equipment for road freight transportation according to claim 3, characterized in that, The rolling assembly comprises a fixed frame (24), the fixed frames (24) are fixedly connected to the symmetrically distributed sliding wedge blocks (23), and the rollers (25) are rotatably connected to the symmetrically distributed fixed frames (24), and the rollers (25) are used to reduce the friction between the sliding wedge blocks (23) and the inner wall of the cement pipe.

5. The loading and unloading equipment for road freight transportation according to claim 4, characterized in that, The invention also comprises a toggle mechanism for withdrawing the sliding wedge block (23) from the cement pipe, the toggle mechanism being arranged on the fixing member (2), the toggle mechanism comprising a rotating shaft (3), the fixing members (2) being symmetrically distributed and being rotatably connected to the rotating shafts (3), the sides of the rotating shafts (3) being close to each other being fixedly connected to toggle plates (31), the sides of the rotating shafts (3) being far away from each other being fixedly connected to gears (32), the first guide frames (22) being symmetrically distributed and being fixedly connected to connecting members (33), and the connecting members (33) being symmetrically distributed and being fixedly connected to racks (34).

6. The loading and unloading equipment for road freight transportation according to claim 5, characterized in that, The rack (34) is meshed with the adjacent gear (32).

7. An unloading and loading device for road freight transportation according to claim 6, characterized in that, The invention also comprises an adjusting mechanism for adjusting the distance between the two movable frames (1) according to the length of the cement pipeline. The adjusting mechanism is arranged on the movable frame (1), and comprises a mounting block (401). A symmetrically distributed mounting block (401) is fixedly connected to one side of the movable frame (1) close to the mounting seat (1101). The symmetrically distributed mounting blocks (401) are located outside the mounting seat (1101). Bidirectional screws (4) are rotatably connected between the symmetrically distributed mounting blocks (401), and the bidirectional screws (4) are threadedly connected to the symmetrically distributed mounting seats (1101).

8. The loading and unloading equipment for road freight transportation according to claim 7, characterized in that, It further includes a deviation correction mechanism for preventing the cement pipe from deviating when rolling along the multi-section guide member (11). The deviation correction mechanism is arranged on the symmetrically distributed blocking members (141). The deviation correction mechanism includes a U-shaped sliding member (41). The symmetrically distributed blocking members (141) are both slidably connected with the U-shaped sliding member (41). Second guide frames (44) are fixedly connected to the mutually remote sides of the blocking members (141). Centering members (42) are both slidably connected to the symmetrically distributed second guide frames (44). Energy storage springs (43) are connected between the centering members (42) and the adjacent second guide frames (44). The symmetrically distributed energy storage springs (43) are both wound around the adjacent second guide frames (44).

9. The loading and unloading equipment for road freight transportation according to claim 8, characterized in that, The U-shaped sliding member (41) and the adjacent centering member (42) are both in extrusion fit.

10. The loading and unloading equipment for road freight transportation according to claim 9, characterized in that, Symmetrically distributed wheels are installed at the bottom of the moving frame (1).

Images