A self-propelled flatbed transport vehicle with adjustable length

Abstract

The utility model provides a length adjustable self -propelled flatbed truck, including front frame, rear frame, connecting middle beam, self -driving system, cable tow system, the front frame and rear frame are all hollow box structure, the both ends of connecting middle beam are slidably inserted into the hollow box body inside of front frame, rear frame respectively, the both sides board of connecting middle beam is equipped with a plurality of groups of beam upper axle hole along its length direction, the both sides board of rear end of front frame, the both sides board of front end of rear frame all are correspondingly equipped with frame upper axle hole, the beam upper axle hole and frame upper axle hole are locked through the bolt axle after the alignment, the hollow box body bottom of front frame, rear frame all is equipped with vertical gyro wheel, and the both sides inner wall of hollow box body is equipped with horizontal gyro wheel, the top of connecting middle beam is equipped with the gyro wheel of branch, the vertical gyro wheel supports connecting middle beam bottom, the horizontal gyro wheel and the both sides wall of connecting middle beam are pasted, the gyro wheel of branch and hollow box top inner wall contact.

Description

Technical Field

[0001] This utility model relates to the field of vehicle transportation technology, and in particular to a self-propelled flatbed transport vehicle with adjustable length. Background Technology

[0002] In material transportation scenarios within factory areas (such as heavy machinery plants and steel structure plants), materials like steel beams and large box-shaped structures vary significantly in length. Existing transportation equipment primarily uses tractor-trailers, which suffer from the following problems: To accommodate ultra-long materials, semi-trailers are typically designed with a fixed length, resulting in significant redundant length and low space utilization when transporting shorter materials; the fixed length leads to a large turning radius, hindering maneuverability in narrow factory passages and increasing the risk of collisions with equipment and walls; transporting materials of varying lengths requires changing to different specifications of semi-trailers or installing extension devices, a process that requires a tractor unit, is time-consuming, necessitates multiple personnel, and incurs high labor costs. Current technology cannot simultaneously meet the demands of transporting long materials and balancing the limited space of a factory. Therefore, there is an urgent need for a transportation system that allows for easy length adjustment, autonomous driving, and flexible steering. Utility Model Content

[0003] To address the aforementioned technical problems, a self-propelled flatbed transport vehicle with adjustable length is provided. The technical means employed in this utility model are as follows: An adjustable-length self-propelled flatbed transport vehicle includes a front frame, a rear frame, a connecting beam, a self-drive system, and a cable-stayed vehicle system. Both the front and rear frames are hollow box structures. The two ends of the connecting beam are slidably inserted into the hollow boxes of the front and rear frames, respectively. The two side plates of the connecting beam have multiple sets of beam shaft holes along their length. The rear side plates of the front frame and the front side plates of the rear frame are respectively provided with frame shaft holes. The beam shaft holes and frame shaft holes are aligned and locked by a pin shaft. The bottom of the hollow box of the front and rear frames is provided with vertical rollers, and the inner walls of the two sides of the hollow box are provided with horizontal rollers. The top of the connecting beam is provided with a support roller. The vertical rollers support the bottom of the connecting beam, the horizontal rollers are in contact with the two side walls of the connecting beam, and the support rollers are in contact with the inner wall of the top of the hollow box.

[0004] Furthermore, the self-driving system includes a battery pack, multiple sets of drive steering wheels, and a control box. The battery pack is mounted on the front frame, the multiple sets of drive steering wheels are respectively mounted on the bottom of the front frame and the rear frame, and there are two control boxes, which are respectively mounted on the sides of the front frame and the rear frame.

[0005] Furthermore, the two ends of the cable towing system are connected to the front frame and the rear frame respectively, and can extend and retract with the relative movement of the front and rear frames. The length is adjustable to adapt to different overall vehicle lengths.

[0006] Furthermore, it also includes a ranging device and a steering control system. The ranging device includes a first ranging end and a second ranging end. The first ranging end is located at the rear end of the front frame, and the second ranging end is located at the front end of the rear frame. The steering control system is electrically connected to the self-driving system and the ranging device, respectively, and is used to control the steering angle of the drive steering wheel assembly based on the length data fed back by the ranging device.

[0007] Furthermore, the end of the pin shaft is provided with a snap-locking structure, which includes an elastic claw and a groove. The elastic claw engages to prevent the pin shaft from coming out.

[0008] Furthermore, the beam shaft holes on both sides of the connecting beam are set in three sets, and the three sets of beam shaft holes are arranged at intervals along the length direction of the connecting beam to adapt to different overall vehicle lengths.

[0009] Furthermore, the pin shafts are configured in four groups, with the four groups of pin shafts arranged symmetrically in pairs on both sides of the connecting beam to restrict the relative sliding and rotation between the connecting beam and the front and rear frames.

[0010] Furthermore, the cable dragging system includes multiple relatively sliding tracks, with adjacent tracks connected by sliders to form a retractable integral structure.

[0011] Furthermore, the self-driving system has four sets of drive steering wheels, which are respectively located at the four corners of the bottom of the front frame and the rear frame.

[0012] Furthermore, the ranging device is a laser ranging sensor, the first ranging end is a laser emitting end, and the second ranging end is a laser receiving end.

[0013] Furthermore, the steering control system includes a PLC controller and a steering encoder, the steering encoder being integrated into the drive steering wheel assembly to monitor the actual steering angle of the drive steering wheel assembly.

[0014] Furthermore, the control box has a built-in drive controller and communication module, and the two control boxes are connected to each other through cables in the cable dragging system.

[0015] This utility model has the following advantages: 1. The connecting beam achieves quick switching between three lengths through locking of the shaft hole and the pin shaft. Four sets of pin shafts restrict sliding and rotation, and the snap-locking structure prevents dislodgement, ensuring structural stability during heavy-duty transportation. Vertical rollers, horizontal rollers, and support rollers limit the connecting beam in three dimensions, resulting in low sliding resistance. After manually inserting and removing the pin shafts, the length can be adjusted simply by driving the rear frame, eliminating the need for hoisting equipment and solving the problem of existing equipment relying on external force for adjustment.

[0016] 2. The frame and crossbeams are connected by pin shafts, ensuring safe locking while allowing for quick disassembly and adjustment of the vehicle's length. The vehicle length can be adjusted via the frame and connecting beam structure, enabling the transport of materials of different lengths while maintaining the vehicle's minimum turning radius and transport flexibility, adapting to transportation within limited spaces. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the short body of the present invention.

[0019] Figure 2 This is a schematic diagram of the long vehicle body of this utility model.

[0020] Figure 3 This is a preferred self-propelled drive system in the device of this utility model.

[0021] Figure 4 This is a schematic diagram of a preferred ranging method in the device of this utility model.

[0022] Figure 5 This is a three-dimensional schematic diagram of a connecting shaft hole arrangement in the device of this utility model.

[0023] Figure 6 This is a cross-sectional view of the connection shaft hole arrangement of this utility model.

[0024] Figure 7 This is a schematic diagram of a preferred embodiment of the guide roller in the device of this utility model.

[0025] Figure 8 This is a schematic diagram of a preferred cable dragging system in the device of this utility model.

[0026] In the diagram: 1. Front frame; 2. Rear frame; 21. Axle hole on the frame; 22. Pin shaft; 221. Handle; 23. Locking structure; 3. Connecting beam; 31. Axle hole on the beam; 32. Vertical roller; 33. Horizontal roller; 34. Support roller; 4. Self-driving system; 41. Battery pack; 42. Drive steering wheel assembly; 43. Drive control box; 5. Cable trailing system; 6. Distance measuring device; 61. Transmitter; 62. Receiver. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figures 1-8 As shown, this utility model embodiment discloses a self-propelled flatbed transport vehicle with adjustable length, including a front frame 1, a rear frame 2, a connecting beam 3, a self-drive system 4, and a cable-stayed vehicle system 5. Both the front frame 1 and the rear frame 2 are hollow box structures. The two ends of the connecting beam 3 can be slidably inserted into the hollow box of the front frame 1 and the rear frame 2, respectively. The two side plates of the connecting beam 3 are provided with multiple sets of beam shaft holes 31 along their length direction. The rear side plates of the front frame 1 and the front side plates of the rear frame 2 are provided with corresponding frame shaft holes 21. The beam shaft holes 31 and the frame shaft holes 21 are aligned and locked by a pin shaft 22. The bottom of the hollow box of the front frame 1 and the rear frame 2 are provided with vertical rollers 32, and the inner walls of the two sides of the hollow box are provided with horizontal rollers 33. The top of the connecting beam 3 is provided with a support roller 34. The vertical rollers 32 support the bottom of the connecting beam 3, the horizontal rollers 33 are in contact with the two side walls of the connecting beam 3, and the support rollers 34 are in contact with the inner wall of the top of the hollow box.

[0029] Furthermore, the self-driving system 4 includes a battery pack 41, multiple sets of drive steering wheel sets 42, and a control box 43. The battery pack 41 is mounted on the front frame 1, the multiple sets of drive steering wheel sets 42 are respectively mounted on the bottom of the front frame 1 and the rear frame 2, and there are two control boxes 43, which are respectively mounted on the sides of the front frame 1 and the rear frame 2.

[0030] Furthermore, the two ends of the cable towing system 5 are respectively connected to the front frame 1 and the rear frame 2, and can slide and extend with the relative sliding of the front frame 1 and the rear frame 2.

[0031] Furthermore, the end of the pin shaft 22 is provided with a snap-lock structure 23, which includes an elastic claw and a groove. The elastic claw engages to prevent the pin shaft 22 from coming out.

[0032] Furthermore, the beam shaft holes 31 on both sides of the connecting beam 3 are set into three groups, and the three groups of beam shaft holes 31 are arranged at intervals along the length direction of the connecting beam 3 to adapt to different overall vehicle lengths.

[0033] Furthermore, the pin shafts 22 are configured in four groups, with each group symmetrically arranged in pairs on both sides of the connecting beam 3 to restrict the relative sliding and rotation between the connecting beam 3 and the front frame 1 and the rear frame 2. The pin shafts 22 are integrally formed or welded with handles 221, which are U-shaped or cylindrical for easy gripping. Operators can quickly insert and remove the pin shafts 22 using the handles 221.

[0034] In practical use, the operator determines the target overall vehicle length based on the length of the material to be transported. The control box 43 of the front frame 1 controls the braking of the two sets of drive steering wheel groups 42 at the bottom of the front frame 1 through the drive controller, ensuring that the front frame 1 is fixed and preventing the vehicle from shifting during adjustment. The operator holds the handle 221 at the end of the pin shaft 22 and pulls the pin shaft 22 outward. At this time, the elastic claw of the snap-lock structure 23 is squeezed and contracted by external force, disengaging from the groove. The pin shaft 22 is pulled out from the shaft hole 21 on the frame and the shaft hole 31 on the beam. After all four sets of pin shafts are unlocked, the connecting beam 3 can slide freely. The operator controls the two sets of drive steering wheel groups 42 at the bottom of the rear frame 2 to start, driving the rear frame 2 to move slowly away from the front frame 1. During the movement, the connecting beam 3 is gradually pulled out from the hollow box of the rear frame 2. The vertical roller 32, horizontal roller 33, and support roller 34 roll synchronously to reduce sliding resistance and limit deviation. Once the target length is reached, the drive steering wheel assembly 42 stops moving. The operator then uses handle 221 to reinsert the four sets of pin shafts 22 into the aligned shaft holes. The elastic claws of the snap-lock structure 23 automatically pop out and engage with the grooves to complete the locking.

[0035] The above technical solution has effectively solved the technical problems existing in the prior art. As an expandable implementation method, this utility model can also be improved with automation. Specifically, Furthermore, it also includes a ranging device 6 and a steering control system. The ranging device 6 includes a first ranging end 61 and a second ranging end 62. The first ranging end 61 is located at the rear end of the front frame 1, and the second ranging end 62 is located at the front end of the rear frame 2. The steering control system is electrically connected to the self-driving system 4 and the ranging device 6, respectively, and is used to control the steering angle of the drive steering wheel assembly 42 according to the length data fed back by the ranging device 6.

[0036] Furthermore, the cable towing system 5 includes multiple relatively sliding tracks, with adjacent tracks connected by sliders to form a retractable integral structure. During adjustment, the tracks of the cable towing system 5 extend synchronously with the sliding of the frame 2, while the internal cables remain connected.

[0037] Furthermore, the self-driving system 4 has four sets of drive steering wheel groups 42, which are respectively located at the four corners of the bottom of the front frame 1 and the rear frame 2.

[0038] Furthermore, the ranging device 6 is a laser ranging sensor, the first ranging end 61 is a laser emitting end, and the second ranging end 62 is a laser receiving end.

[0039] Furthermore, the steering control system includes a PLC controller and a steering encoder, the steering encoder being integrated into the drive steering wheel assembly 42 and used to monitor the actual steering angle of the drive steering wheel assembly 42.

[0040] Furthermore, the drive control box 43 has a built-in drive controller and communication module, and the two drive control boxes 43 are connected to each other through the cable in the cable dragging system 5.

[0041] The drive controller and PLC controller in the drive control box 43 have preset control schemes. The measurement data from the laser rangefinder 6 can be transmitted to the PLC controller in real time. The PLC controller automatically converts the data into the target distance. The drive steering wheel assembly 42 of the front frame 1 automatically brakes. At the same time, the PLC controller sends an unlocking prompt to the drive control box 43 of the rear frame 2 through the communication module. If an electric pin shaft is configured, the pin shaft 22 can be automatically pulled out by the drive motor, eliminating the need for manual insertion and removal. The drive steering wheel assembly 42 of the rear frame 2 moves automatically at the speed set by the PLC controller, and the rangefinder 6 provides real-time distance feedback. When the distance reaches the target value, the rear frame 2 automatically stops, and the electric pin shaft automatically inserts into the shaft hole and locks. The core technologies upon which the above automation functions rely are all existing mature technologies.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A self-propelled flatbed transport vehicle with adjustable length, characterized in that, Including the front frame, rear frame, connecting beam, self-drive system, and cable tie system. Both the front and rear frames are hollow box structures. The two ends of the connecting beam are slidably inserted into the hollow boxes of the front and rear frames, respectively. The two side plates of the connecting beam have multiple sets of beam shaft holes along their length. The rear side plates of the front frame and the front side plates of the rear frame are respectively provided with frame shaft holes. The beam shaft holes and frame shaft holes are aligned and locked by a pin shaft. The bottom of the hollow box of the front and rear frames is provided with vertical rollers, and the inner walls of the two sides of the hollow box are provided with horizontal rollers. The top of the connecting beam is provided with a support roller. The vertical rollers support the bottom of the connecting beam, the horizontal rollers are in contact with the two side walls of the connecting beam, and the support rollers are in contact with the inner wall of the top of the hollow box.

2. The length-adjustable self-propelled flatbed transport vehicle according to claim 1, characterized in that, The self-driving system includes a battery pack, multiple sets of drive steering wheels, and a control box. The battery pack is mounted on the front frame, the multiple sets of drive steering wheels are respectively mounted on the bottom of the front frame and the rear frame, and there are two control boxes, which are respectively located on the sides of the front frame and the rear frame.

3. The self-propelled flatbed transport vehicle with adjustable length according to claim 1, characterized in that, The cable towing system is connected to the front frame and the rear frame at both ends, respectively. It can extend and retract with the relative movement of the front and rear frames, and its length is adjustable to adapt to different overall vehicle lengths.

4. The self-propelled flatbed transport vehicle with adjustable length according to claim 1, characterized in that, It also includes a distance measuring device and a steering control system. The distance measuring device includes a first distance measuring end and a second distance measuring end. The first distance measuring end is located at the rear end of the front frame, and the second distance measuring end is located at the front end of the rear frame. The steering control system is electrically connected to the self-driving system and the distance measuring device, and is used to control the steering angle of the drive steering wheel assembly based on the length data fed back by the distance measuring device.

5. The self-propelled flatbed transport vehicle with adjustable length according to claim 1, characterized in that, The end of the pin shaft is provided with a snap-locking structure, which includes an elastic claw and a groove. The elastic claw engages to prevent the pin shaft from coming out.

6. The length-adjustable self-propelled flatbed transport vehicle according to claim 1, characterized in that, The beam shaft holes on both sides of the connecting beam are set in three groups, and the three groups of beam shaft holes are arranged at intervals along the length of the connecting beam to adapt to different overall vehicle lengths.

7. The self-propelled flatbed transport vehicle with adjustable length according to claim 1, characterized in that, The pin shafts are arranged in four groups, with each group symmetrically arranged on both sides of the connecting beam to restrict the relative sliding and rotation between the connecting beam and the front and rear frames.

8. The self-propelled flatbed transport vehicle with adjustable length according to claim 1, characterized in that, The self-driving system has four sets of drive steering wheels, which are respectively located at the four corners of the bottom of the front frame and the rear frame.

9. The length-adjustable self-propelled flatbed transport vehicle according to claim 4, characterized in that, The ranging device is a laser ranging sensor, with the first ranging end being a laser emitting end and the second ranging end being a laser receiving end.

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