Truck carriage and truck tarpaulin system

Abstract

The invention provides a truck carriage and a truck tarpaulin system, and the truck tarpaulin system comprises a tarpaulin cover which is provided with a first cross beam and a second cross beam which are oppositely arranged; the tarpaulin frame is matched with the tarpaulin cover; the crawling mechanism comprises a first crawler arranged on the first cross beam and is provided with a first driving shaft, and a first meshing tooth part is arranged at the end part of the first driving shaft; the second crawler is arranged on the second cross beam and is provided with a second driving shaft, and a second meshing tooth part is arranged at the end part of the second driving shaft; and matching parts are arranged at the two ends of the synchronizing shaft correspondingly, and the matching parts can be meshed with the first meshing tooth part and the second meshing tooth part correspondingly, so that synchronous transmission between the first crawler and the second crawler is achieved. According to the application, synchronous transmission between the first crawler and the second crawler can be realized, so that the tarpaulin cover can move more stably and synchronously, the consistency of the tarpaulin cover in the moving process is ensured, and the user experience is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation equipment, and particularly relates to a freight car carriage and a freight car tarpaulin system. Background Art

[0002] During the process of goods transportation or storage, in order to prevent the goods in the cargo compartment from being blown away by the wind, or to prevent pollutants such as dust that may exist in the cargo compartment from entering the air and polluting the environment, or to protect the goods, a tarpaulin is usually used to wrap and cover the goods. Traditionally, covering the tarpaulin manually is time-consuming and laborious, often requiring multiple people to complete together, with very low efficiency and difficult to meet the increasing freight requirements; moreover, sometimes it is necessary for the staff to climb onto the carriage to operate, which not only increases the burden on the staff but is also very dangerous, increasing the risk of injury to the staff.

[0003] In view of this, there are some automatic tarpaulin devices in the prior art, including cloth winding rods arranged on both sides of the carriage and driving members connected to the ends of the cloth winding rods, and the cloth winding rods are connected to the edges of the tarpaulin, and through the driving of the driving members, the tarpaulin can be wound around the outside of the cloth winding rods as the cloth winding rods rotate. For the automatic tarpaulin device with such a structure, although it can realize the automatic winding and covering of the tarpaulin, since the top cover of the device cannot be opened and closed, the goods can only be loaded and unloaded from the side of the carriage, which to a certain extent limits the application scenarios of the device.

[0004] In addition, the Chinese utility model patent with the application number CN117719414A discloses an automatic tarpaulin system and a carriage. The automatic tarpaulin system includes a tarpaulin frame, a tarpaulin cover and a crawling device arranged on the tarpaulin cover. Through the arrangement of the crawling device, the tarpaulin cover can move relative to the tarpaulin frame, and the goods can be loaded and unloaded from the top of the carriage. In this system, in order to improve the smoothness of the movement process of the tarpaulin cover, the crawling device can be configured as two, and the two crawling devices are respectively arranged at the front end and the rear end of the tarpaulin cover, and the two crawling devices can be driven by two drivers respectively. However, this setting method will not only increase the cost of the device but also cannot well ensure the synchronization of the two crawling devices. Once the two drivers cannot drive the two crawling devices synchronously, it will greatly affect the stability of the movement process of the tarpaulin cover, and seriously it is very likely to cause the failure of the automatic tarpaulin system, which is not conducive to the user experience. Summary of the Invention

[0005] In view of the above problems, the embodiments of the present invention provide a freight car carriage and a freight car tarpaulin system to solve the problems in the existing automatic tarpaulin devices that the top of the device cannot be opened and closed and the synchronization between multiple crawling devices is poor.

[0006] An embodiment of the present invention provides a freight car carriage, including a carriage body and a freight car tarpaulin system arranged on the carriage body. The freight car tarpaulin system includes:

[0007] A tarpaulin cover having a first cross beam and a second cross beam arranged opposite to each other;

[0008] A tarpaulin rack matching the tarpaulin cover;

[0009] A crawling mechanism, including

[0010] A first crawler arranged on the first cross beam, having a first drive shaft, and a first toothed portion is arranged at the end of the first drive shaft;

[0011] A second crawler arranged on the second cross beam, having a second drive shaft, and a second toothed portion is arranged at the end of the second drive shaft;

[0012] A synchronizing shaft, with mating portions arranged at both ends respectively, and the mating portions can be meshed with the first toothed portion and the second toothed portion respectively to realize synchronous transmission between the first crawler and the second crawler.

[0013] In some embodiments, the first toothed portion and the second toothed portion are respectively external teeth formed on the surface of the first drive shaft and the surface of the second drive shaft, and the mating portion is internal teeth formed at both ends of the synchronizing shaft.

[0014] In some embodiments, a driving wheel is arranged at the end of the first drive shaft, a driven wheel is arranged at the end of the second drive shaft, the first toothed portion is a driving tooth formed on the surface of the driving wheel, and the second toothed portion is a driven tooth formed on the surface of the driven wheel; transmission wheels are arranged at both ends of the synchronizing shaft respectively, and the mating portion is a transmission tooth formed on the surface of the transmission wheel.

[0015] In some embodiments, there are two synchronizing shafts, and the two synchronizing shafts are respectively rotatably connected to the first crawler and the second crawler, and the transmission teeth at both ends of the two synchronizing shafts are respectively meshed with the driving teeth and the driven teeth.

[0016] In some embodiments, the tarpaulin rack has a first cross bar located below the first cross beam and a first guiding member arranged on the surface of the first cross bar, and a first guiding groove is formed in the first cross bar;

[0017] The first crawler includes:

[0018] A first crawling seat connected to the first cross beam, and the first drive shaft is arranged along the center line of the first crawling seat;

[0019] A first transmission member coaxially arranged outside the first drive shaft, and the first transmission member can cooperate with the first guiding member;

[0020] A first connecting plate, with the upper part rotatably connected to the first drive shaft and a first roller matched with the first guiding groove arranged at the lower part;

[0021] A driving member connected to the first driving shaft, and under the drive of the driving member, the first driving shaft, the synchronizing shaft and the second driving shaft are synchronously driven, so that the tarpaulin cover can move along the extending direction of the guiding member.

[0022] In some embodiments, the tarpaulin frame has a second cross bar located below the second cross beam and a second guiding member provided on the surface of the second cross bar, and the second cross bar is provided with a second guiding groove;

[0023] The second crawler includes:

[0024] A second crawler seat connected to the second cross beam, and the second driving shaft is arranged along the center line of the second crawler seat;

[0025] A second transmission member coaxially arranged outside the second driving shaft, and the second transmission member can cooperate with the second guiding member;

[0026] A second connecting plate, the upper part of which is rotatably connected to the second driving shaft, and the lower part is provided with a second roller cooperating with the second guiding groove.

[0027] In some embodiments, the first crawler further includes a first guiding roller rotatably connected to the first crawler seat, and the second crawler further includes a second guiding roller rotatably connected to the second crawler seat, and the first guiding roller and the second guiding roller can respectively contact the first guiding member and the second guiding member.

[0028] In some embodiments, the tarpaulin frame further has a stake respectively connected to the bottom ends of the first cross bar and the second cross bar, and a turning door provided on the side of the tarpaulin frame, and the turning door includes:

[0029] A door body, the top of which is provided with guiding members respectively cooperating with the first guiding groove and the second guiding groove;

[0030] A rotating rod, the two ends of which are respectively rotatably connected to the door body and the stake;

[0031] An expansion member, the two ends of which are respectively rotatably connected to the door body and the tarpaulin frame, and as the expansion member expands and contracts, the guiding member can move along the extending direction of the first guiding groove and the second guiding groove, so as to realize the turning of the door body between the side and the top of the tarpaulin frame.

[0032] In some embodiments, the tarpaulin frame further has a tensioner respectively provided on the first cross bar and the second cross bar, and the tensioner includes:

[0033] A connecting sleeve respectively connected to the ends of the first guiding member and the second guiding member;

[0034] A fixed seat located below the connecting sleeve, which is provided with a threaded hole;

[0035] The adjusting screw passes through the threaded hole and is rotatably connected to the connecting sleeve, and the adjusting screw is matched with the threaded hole to adjust the distance between the connecting sleeve and the fixed seat.

[0036] In addition, an embodiment of the present invention further provides a truck tarpaulin system applied to the above-mentioned truck carriage. The truck tarpaulin system includes:

[0037] A tarpaulin cover having a first cross beam and a second cross beam arranged oppositely;

[0038] A tarpaulin rack matching the tarpaulin cover;

[0039] A crawling mechanism including

[0040] A first crawler arranged on the first cross beam, having a first drive shaft, and a first ratchet part is arranged at the end of the first drive shaft;

[0041] A second crawler arranged on the second cross beam, having a second drive shaft, and a second ratchet part is arranged at the end of the second drive shaft;

[0042] A synchronizing shaft, with engaging parts arranged at both ends, and the engaging parts can be respectively engaged with the first ratchet part and the second ratchet part to realize synchronous transmission between the first crawler and the second crawler.

[0043] Due to the adoption of the above technical solution, the technical effects obtained by the present invention are:

[0044] The truck carriage provided by the present invention includes a carriage body and a truck tarpaulin system, and the truck tarpaulin system includes a tarpaulin cover, a tarpaulin rack and a crawling mechanism. Among them, the tarpaulin cover has a first cross beam and a second cross beam, and the crawling mechanism includes a first crawler, a second crawler and a synchronizing shaft. Specifically, through the meshing of the first ratchet part in the first crawler and the second ratchet part in the second crawler with the engaging parts at both ends of the synchronizing shaft respectively, synchronous transmission between the first crawler and the second crawler can be realized, so that the tarpaulin cover can move more smoothly and synchronously, which is conducive to ensuring the consistency during the movement of the tarpaulin cover and avoiding problems such as the tarpaulin cover being skewed or stuck caused by one side moving first and the other side moving later, which is beneficial to the user experience. In addition, compared with the transmission structure of dual drivers in the prior art, this transmission structure can greatly reduce the cost of the equipment.

[0045] In addition, the truck tarpaulin system provided by the present invention, by being applied to the above-mentioned truck carriage, can bring great convenience to the loading and unloading process of users and is beneficial to the user experience.

[0046] The above description is only an overview of the technical solution of the embodiments of the present invention. In order to understand the technical means of the embodiments of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the embodiments of the present invention more obvious and understandable, the following specifically gives the specific embodiments of the present invention. Description of the Drawings

[0047] The drawings are only used to illustrate the embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0048] Figure 1 is a schematic structural diagram of a tarpaulin system for a freight truck provided by the present invention;

[0049] Figure 2 is a schematic structural diagram of a tarpaulin cover provided by the present invention;

[0050] Figure 3 is a schematic structural diagram of another tarpaulin cover provided by the present invention;

[0051] Figure 4 is a schematic structural diagram of a synchronizing shaft provided by the present invention;

[0052] Figure 5 is a schematic structural diagram of another tarpaulin system for a freight truck provided by the present invention;

[0053] Figure 6 is a schematic structural diagram of yet another tarpaulin cover provided by the present invention;

[0054] Figure 7 is a schematic structural diagram of a tarpaulin rack provided by the present invention;

[0055] Figure 8 is a schematic structural diagram of another tarpaulin rack provided by the present invention;

[0056] Figure 9 is a schematic structural diagram of yet another tarpaulin cover provided by the present invention;

[0057] Figure 10 is a schematic structural diagram of yet another tarpaulin system for a freight truck provided by the present invention;

[0058] Figure 11 is a schematic structural diagram of a door body provided by the present invention;

[0059] Figure 12 is a schematic structural diagram of a first cross bar provided by the present invention.

[0060] In the figure:

[0061] 100 tarpaulin cover, 110 first cross beam, 120 second cross beam, 130 side beam;

[0062] 200 Tarpaulin rack, 210 First cross bar, 211 First guiding member, 212 First guiding groove, 220 Second cross bar, 221 Second guiding member, 222 Second guiding groove, 230 Vertical post, 240 Flip door, 241 Door body, 2411 Guiding member, 242 Rotating rod, 243 Telescopic member, 250 Tensioner, 251 Connecting sleeve, 252 Fixed seat, 253 Adjusting screw rod, 260 Side bar, 261 Pushing member, 270 Reinforcing part;

[0063] 300 Crawling mechanism, 310 First crawler, 311 First drive shaft, 3111 First ratchet part, 3112 Driving wheel, 312 First crawling seat, 313 First transmission member, 314 First connecting plate, 315 Driving member, 316 First roller, 317 First guiding roller, 320 Second crawler, 321 Second drive shaft, 3211 Second ratchet part, 3212 Driven wheel, 322 Second crawling seat, 323 Second transmission member, 324 Second connecting plate, 325 Second roller, 326 Second guiding roller, 330 Synchronous shaft, 331 Matching part, 332 Transmission wheel. Detailed implementation mode

[0064] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein.

[0065] Refer to Figures 1-4 As shown, an embodiment of the present invention provides a freight car carriage, including a carriage body (not shown in the figure) and a freight car tarpaulin system provided on the carriage body, and the freight car tarpaulin system includes a tarpaulin cover 100, a tarpaulin rack 200 and a crawling mechanism 300. Among them, the tarpaulin cover 100 has a first cross beam 110 and a second cross beam 120 arranged oppositely, the tarpaulin rack 200 is matched with the tarpaulin cover 100, the crawling mechanism 300 includes a first crawler 310, a second crawler 320 and a synchronous shaft 330, the first crawler 310 is arranged on the first cross beam 110, and the first crawler 310 has a first drive shaft 311, and a first ratchet part 3111 is arranged at the end of the first drive shaft 311; the second crawler 320 is arranged on the second cross beam 120, and the second crawler 320 has a second drive shaft 321, and a second ratchet part 3211 is arranged at the end of the second drive shaft 321; matching parts 331 are arranged at both ends of the synchronous shaft 330, and the matching parts 331 can be meshed with the first ratchet part 3111 and the second ratchet part 3211 respectively to realize the synchronous transmission between the first crawler 310 and the second crawler 320.

[0066] It should be noted that the truck tarpaulin system provided by the present application can be used as a special compartment and applied to different trucks separately on the one hand; on the other hand, it can also be used as a matching device for compartments in different types of compartments, for example, compartments of a barge truck, a flatbed truck, a side curtain truck, a dump truck, and other types of compartments that need to be covered with tarpaulins. In addition, since the sizes, specifications, and structures of different types of truck compartments are more or less different, when installing the truck tarpaulin system on different types of truck compartments, the user can appropriately adjust the sizes and specifications of the tarpaulin frame 200, tarpaulin cover 100, and other structures in the truck tarpaulin system according to the parameters of different types of truck compartments. The present application does not limit the application models and application scenarios of the truck tarpaulin system, nor the specific sizes and specifications of the truck tarpaulin system.

[0067] It should also be noted that, although the tarpaulin frame 200 in the present application matches the tarpaulin cover 100 , it does not mean that the structure of the tarpaulin frame 200 is unique. For example, the tarpaulin rack 200 may include only a horizontal bar, and the horizontal bar may be fixedly mounted on the fence of a sled truck compartment; or, the tarpaulin rack 200 may include a connected horizontal bar and side bars (not shown in the figure), and both the horizontal bar and the side bars may be fixedly mounted on the fence of a sled truck compartment; the two tarpaulin rack 200 structures in the above examples are more suitable for sled truck compartments, curtain side truck compartments, etc. because the horizontal bar and / or the side bars are mainly fixed to structures such as the fence of the compartment; or, the tarpaulin rack 200 may include a connected horizontal bar and side bars, and a column connected to the bottom end of the horizontal bar; the tarpaulin rack 200 of this structure can be directly connected to the compartment through the column to achieve the fixation of the tarpaulin rack 200 relative to the compartment, so it can be suitable for more types of truck compartments, such as flatbed truck compartments, panel truck compartments, dump truck compartments, etc. The present application does not limit the specific structure of the tarpaulin rack 200. Correspondingly, the structure of the tarpaulin cover 100 may also be various. For example, the tarpaulin cover 100 may include a crossbeam parallel to the crossbar, and a side beam 130 connected to the crossbeam, and the crossbeam and the side beam 130 may be combined to form a closed frame structure; or, the tarpaulin cover 100 may include a crossbeam, a side beam 130 connected to the crossbeam and enclosed to form a frame structure, and a support beam (not shown in the figure) connected to the side beam 130 and located between the two crossbeams.

[0068] It can be understood that although there are various different synchronous transmission structures in the prior art, such as synchronous belt transmission, universal joint transmission, etc. However, due to the limited load capacity, short service life, relatively low transmission efficiency and accuracy of synchronous belt transmission; and for universal joint transmission, due to the characteristics of the universal joint itself, when the driving shaft rotates at a constant angular velocity, the angular velocity of the driven shaft will change periodically within a certain range, resulting in additional dynamic loads and making the transmission unstable. It can be seen that although the above-mentioned synchronous transmission structures can all achieve synchronous transmission between the first crawler 310 and the second crawler 320, there are more or less certain defects in the transmission effect. Based on this, the present application preferably adopts a synchronous gear transmission structure, which has higher transmission accuracy, better synchronism and stability, and stronger load-bearing capacity, so as to be able to well adapt to the movement process of the tarpaulin cover 100 relative to the tarpaulin frame 200.

[0069] It should also be noted that although in the truck tarpaulin system provided by the present application, the following content and drawings are described by taking the configuration quantity of two crawlers as an example. However, in the actual application process, for some carriages with longer dimensions, in the truck tarpaulin system applied to this carriage, the number of crawlers can also be three, four, five, etc., and when the multiple crawlers are synchronously transmitted through the synchronous shaft 330, the specific synchronous transmission structure can be configured with reference to the relevant content of the present application. The present application does not limit the specific configuration quantity of the crawlers and the transmission method between the multiple crawlers.

[0070] Specifically, in the truck tarpaulin system provided by the present invention, through the meshing between the first toothed part 3111 in the first crawler 310 and the second toothed part 3211 in the second crawler 320 and the engaging parts 331 at both ends of the synchronous shaft 330, the synchronous transmission between the first crawler 310 and the second crawler 320 can be realized, so that the tarpaulin cover 100 can move more smoothly and synchronously, which is beneficial to ensuring the consistency during the movement of the tarpaulin cover 100 and avoiding problems such as skew or jamming of the tarpaulin cover 100 caused by one side moving first and the other side moving later, which is beneficial to the user experience. In addition, compared with the transmission structure of double drives in the prior art, this kind of transmission structure can greatly reduce the cost of the equipment.

[0071] Regarding the synchronous transmission structure among the first toothed part 3111, the second toothed part 3211 and the engaging part 331 in the present application, there can be various different implementation manners in the present application:

[0072] In one implementation manner, continue to refer to Figures 1-4 As shown, the first toothed part 3111 and the second toothed part 3211 are respectively external tooth teeth formed on the surfaces of the first drive shaft 311 and the second drive shaft 321, and the engaging part 331 is internal tooth teeth formed at both ends of the synchronous shaft 330.

[0073] In this configuration method, on the one hand, the cooperation between the first drive shaft 311, the second drive shaft 321 and the synchronizing shaft 330 can be made more compact, saving space and being suitable for application scenarios with limited space. On the other hand, the meshing of the internal teeth and the external teeth can provide high-efficiency power transmission because their tooth surface contact area is relatively large, enabling better load distribution. Moreover, due to the large tooth surface contact area of the internal teeth and the external teeth, the synchronous transmission structure has a strong load-bearing capacity and can withstand large loads. In addition, the cooperation of the internal teeth and the external teeth can achieve relatively smooth transmission, reduce vibration and impact during operation, improve the smoothness of transmission, and significantly reduce the noise generated during transmission, providing a more comfortable working environment.

[0074] In another embodiment, referring to Figure 5 and Figure 6 as shown, a driving wheel 3112 is provided at the end of the first drive shaft 311, a driven wheel 3212 is provided at the end of the second drive shaft 321, the first toothed portion 3111 is a driving tooth (not marked in the figure) formed on the surface of the driving wheel 3112, and the second toothed portion 3211 is a driven tooth (not marked in the figure) formed on the surface of the driven wheel 3212; transmission wheels 332 are respectively provided at both ends of the synchronizing shaft 330, and the engaging portion 331 is a transmission tooth formed on the surface of the transmission wheel 332.

[0075] In this configuration method, by precisely calculating the tooth number ratio of each gear, the driving wheel 3112 and the driven wheel 3212 can operate synchronously, ensuring the accuracy of the synchronous transmission structure. Moreover, this structure is beneficial to reducing slippage between gears, improving transmission efficiency and reducing energy loss.

[0076] In addition, when the synchronous transmission structure adopts the cooperation mode of the driving wheel 3112, the driven wheel 3212 and the transmission wheel 332, the configuration quantity of the synchronizing shaft 330 can be flexibly adjusted to further improve the synchronous transmission effect between the first crawler 310 and the second crawler 320.

[0077] Exemplarily, the synchronizing shaft 330 is configured as two, and the two synchronizing shafts 330 are respectively rotatably connected between the first crawler 310 and the second crawler 320, and the transmission teeth at both ends of the two synchronizing shafts 330 are respectively meshed with the driving teeth and the driven teeth.

[0078] This setting method can further enhance the stability and reliability of the synchronous transmission structure, share the force during transmission, reduce the load on a single synchronizing shaft 330, and improve the durability of the entire truck tarpaulin system.

[0079] In addition, in this embodiment, a speed-regulating gear (not shown in the figure) can be provided between the driving wheel 3112 and the transmission wheel 332, and between the driven wheel 3212 and the transmission wheel 332 for transmission connection. The setting of the speed-regulating gear can adjust the rotation speed and torque of the synchronizing shaft 330, so as to flexibly adjust the rotation speed and torque between multiple crawling mechanisms 300, enabling the multiple crawling mechanisms 300 to adapt to more extensive and complex scenarios. Moreover, the number of speed-regulating gears can be configured as multiple, so that a multi-stage speed-regulating mechanism can be formed between the driving wheel 3112 and the transmission wheel 332, and between the driven wheel 3212 and the transmission wheel 332.

[0080] In some embodiments, referring to Figures 7-9 As shown, the tarpaulin frame 200 has a first cross bar 210 located below the first cross beam 110 and a first guiding member 211 provided on the surface of the first cross bar 210. The first cross bar 210 is provided with a first guiding groove 212. And, the first crawler 310 includes a first crawling seat 312, a first transmission member 313, a first connecting plate 314 and a driving member 315. Among them, the first crawling seat 312 is connected to the first cross beam 110, and the first driving shaft 311 is arranged along the center line of the first crawling seat 312; the first transmission member 313 is coaxially arranged outside the first driving shaft 311, and the first transmission member 313 can cooperate with the first guiding member 211; the upper part of the first connecting plate 314 is rotatably connected to the first driving shaft 311, and the lower part is provided with a first roller 316 that cooperates with the first guiding groove 212; the driving member 315 is connected to the first driving shaft 311, and under the drive of the driving member 315, the first driving shaft 311, the synchronizing shaft 330 and the second driving shaft 321 are synchronously driven, so that the tarpaulin cover 100 can move along the extending direction of the guiding member.

[0081] It should be noted that the first ratchet part 3111 can be formed inside the first crawling seat 312 or outside the first crawling seat 312; correspondingly, the second ratchet part 3211 can be formed inside the second crawling seat 322 or outside the second crawling seat 322. The present application does not limit the specific setting positions of the first ratchet part 3111 and the second ratchet part 3211. When the first ratchet part 3111 and the second ratchet part 3211 are located inside the first crawling seat 312 and the second crawling seat 322, the first ratchet part 3111 and the second ratchet part 3211 can be better protected, which is beneficial to improving the service life of the first ratchet part 3111 and the second ratchet part 3211.

[0082] There can be various different implementation manners for the specific structures of the first roller 316 and the first guiding groove 212, and the present application does not limit this. For example, when the groove wall of the first guiding groove 212 is a plane, the first roller 316 can be a cylindrical roller; or, when the groove wall of the first guiding groove 212 is an arc surface, the first roller 316 can be an arc roller; or, when the groove wall of the first guiding groove 212 is a wedge surface, the first roller 316 can be a wedge roller; when the groove wall of the first guiding groove 212 is a V-shaped surface, the first roller 316 can be an inverted V-shaped roller.

[0083] It can be understood that the first roller 316, as a component in direct contact with the groove wall of the first guiding groove 212, can play a certain guiding role for the tarpaulin cover 100 during the movement of the tarpaulin cover 100 relative to the tarpaulin frame 200. In order to effectively reduce the frictional force between the tarpaulin cover 100 and the tarpaulin frame 200 during the movement of the tarpaulin cover 100, make the relative movement process of the two smoother, and reduce the noise generated during the relative movement of the two. The present application can reduce the frictional force between the tarpaulin cover 100 and the tarpaulin frame 200 by setting a lubricating layer on the surfaces of structures such as the first roller 316, the groove wall of the first guiding groove 212, the first cross bar 210 in the tarpaulin frame 200 or the first cross beam 110 in the tarpaulin cover 100. Among them, the lubricating layer can be formed by lubricating oil, lubricating grease, etc. coated on the surfaces of the above-mentioned structures, or can be formed by materials with low friction coefficients such as polytetrafluoroethylene, silicone rubber, stone mill, Teflon, etc. used in the above-mentioned structures themselves, or can also be formed by low-friction fabrics, films, etc. sleeved on the surfaces of the above-mentioned structures. The present application does not limit this.

[0084] In addition, in the present application, the relative movement between the tarpaulin cover 100 and the tarpaulin frame 200 is achieved through the cooperation between the first transmission member 313 and the first guiding member 211. Among them, the cooperation mode between the first transmission member 313 and the first guiding member 211 can be at least one of various different implementation modes such as sprocket-chain cooperation, gear-rack cooperation, lead screw-nut cooperation, pulley-belt cooperation, etc. The present application does not limit the specific cooperation mode between the first transmission member 313 and the first guiding member 211. Moreover, the specific configured quantity of the first transmission member 313 and the first guiding member 211 can be one or two. The present application also does not limit the set quantity of the first transmission member 313 and the first guiding member 211. Among them, the cooperation between a single first transmission member 313 and a single first guiding member 211 has a simple structure and low cost; the cooperation between two first transmission members 313 and two first guiding members 211 has higher transmission stability. When the quantity of the first transmission member 313 and the first guiding member 211 is configured as two, the two first transmission members 313 and the two first guiding members 211 respectively cooperate to form two sets of transmission mechanisms. Among them, the first set of transmission mechanism can adopt one of the above-mentioned transmission modes, and the second set of transmission mechanism can be the same as or different from the transmission mode of the first set of transmission mechanism. The present application also does not limit this.

[0085] In addition, regarding the setting mode of the two first guiding members 211 in the first cross bar 210, the present application will be described by the following two different examples:

[0086] Example 1

[0087] Referring to Figure 7 and Figure 8 As shown, the two first guiding members 211 are spaced apart and arranged on both sides of the top surface of the first cross bar 210. The first guiding groove 212 penetrates through the top surface of the first cross bar 210 and is formed inside the first cross bar 210, and the first guiding groove 212 is located between the two first guiding members 211. In this example, arranging the two first guiding members 211 on the top surface of the first cross bar 210 can, to a certain extent, facilitate optimizing the layout of the various components arranged on the first cross bar 210 and is conducive to miniaturizing the volume of the device.

[0088] Example 2

[0089] On both sides of the first crossbar 210, side walls extend outward to form support portions (not shown in the figure). Two first guiding members 211 are respectively arranged on the support portions. The first guiding groove 212 penetrates the top surface of the first crossbar 210 and is formed inside the first crossbar 210, and the first guiding groove 212 is located between the two first guiding members 211. Among them, the support portion can be a support plate, a support tube, etc., and the present application does not limit the structure of the support portion. In this example, through the arrangement of the support portion, the support effect on the first guiding member 211 can be improved, thereby facilitating the improvement of the stability of the transmission structure.

[0090] In some embodiments, with continued reference to Figures 7-9 as shown, the tarpaulin frame 200 has a second crossbar 220 located below the second crossbeam 120 and second guiding members 221 arranged on the surface of the second crossbar 220. The second crossbar 220 is provided with a second guiding groove 222; and the second crawler 320 includes a second crawler seat 322, a second transmission member 323, and a second connecting plate 324. Among them, the second crawler seat 322 is connected to the second crossbeam 120, and the second drive shaft 321 is arranged along the center line of the second crawler seat 322; the second transmission member 323 is coaxially arranged outside the second drive shaft 321, and the second transmission member 323 can cooperate with the second guiding member 221; the upper part of the second connecting plate 324 is rotatably connected to the second drive shaft 321, and the lower part is provided with a second roller 325 that cooperates with the second guiding groove 222.

[0091] It should be noted that for the specific structures, cooperation methods, and configured quantities of the second transmission member 323, the second guiding member 221, the second roller 325, and the second guiding groove 222, reference can be made to the above descriptions of the first transmission member 313, the first guiding member 211, the first roller 316, and the first guiding groove 212, and the present application also does not limit this.

[0092] Through the cooperation between the first transmission member 313 and the first guide member 211, the first roller 316 and the first guide groove 212, the second transmission member 323 and the second guide member 221, and the second roller 325 and the second guide groove 222, the tarpaulin cover 100 can move along the contour of the tarpaulin frame 200 driven by the first crawler 310 and the second crawler 320. First, when the first roller 316 cooperates with the first guide groove 212 and the second roller 325 cooperates with the second guide groove 222, the surface of the first roller 316 contacts the inner wall of the first guide groove 212, and the surface of the second roller 325 contacts the inner wall of the second guide groove 222. When the tarpaulin cover 100 switches from the horizontal state to the vertical state, it can make the flipping process of the tarpaulin cover 100 smoother, thereby reducing the impact of the tarpaulin cover 100 on the tarpaulin frame 200, and avoiding the shaking of the equipment caused by excessive impact to the greatest extent. Furthermore, it is beneficial to ensure the stability of structures such as the tarpaulin cover 100 and the tarpaulin frame 200, and greatly eliminate potential safety hazards of the equipment. Secondly, by configuring the first guide member 211 and the second guide member 221 in the tarpaulin frame 200 as two in two columns, and through the cooperation between the two first guide members 211 and the two first transmission members 313, and between the two second guide members 221 and the two second transmission members 323, not only can the stability and reliability of the transmission structure in the crawler mechanism 300 be improved, but also it is beneficial to expand the maximum load of the transmission structure. Moreover, after the equipment works for a long time, this setting method can greatly reduce the wear of the transmission structure, thereby facilitating the improvement of the transmission accuracy of the equipment.

[0093] In some embodiments, with continued reference to Figure 9 as shown, the first crawler 310 further includes a first guide roller 317 rotatably connected to the first crawler seat 312, the second crawler 320 further includes a second guide roller 326 rotatably connected to the second crawler seat 322, and the first guide roller 317 and the second guide roller 326 can respectively contact the first guide member 211 and the second guide member 221.

[0094] Preferably, the number of both the first guide roller 317 and the second guide roller 326 is two, and the two first guide rollers 317 can be respectively located on both sides of the first transmission member 313, and the two second guide rollers 326 are respectively located on both sides of the second transmission member 323. Moreover, the two first guide rollers 317 can be respectively located on the left and right sides of the first transmission member 313 in the horizontal direction, or can be respectively located on the upper and lower sides of the first transmission member 313 in the vertical direction; the two second guide rollers 326 can be respectively located on the left and right sides of the second transmission member 323 in the horizontal direction, or can be respectively located on the upper and lower sides of the second transmission member 323 in the vertical direction.

[0095] Among them, the first guide roller 317 and the second guide roller 326 can not only play a certain guiding role during the movement of the tarpaulin cover 100 relative to the tarpaulin frame 200, so that the tarpaulin cover 100 can move more precisely along the contours of the first cross bar 210 and the second cross bar 220; moreover, when the two first guide rollers 317 and the two second guide rollers 326 are arranged horizontally, the two first guide rollers 317 can contact the first guiding member 211 or the top surface of the first cross bar 210 during the flipping process of the tarpaulin cover 100; the two second guide rollers 326 can contact the second guiding member 221 or the top surface of the second cross bar 220 during the flipping process of the tarpaulin cover 100. When the two first guide rollers 317 and the two second guide rollers 326 are arranged vertically, at least one of the two first guide rollers 317 can contact the bottom surface or the top surface of the first cross bar 210 during the flipping process of the tarpaulin cover 100, and at least one of the two second guide rollers 326 can contact the bottom surface or the top surface of the second cross bar 220 during the flipping process of the tarpaulin cover 100, so that the flipping process of the tarpaulin cover 100 is smoother, further reducing the impact that the tarpaulin cover 100 may exert on the tarpaulin frame 200. It can be understood that the structures of the first guide roller 317 and the second guide roller 326 can be the same as or different from the structures of the first roller 316 and the second roller 325, and the present application does not limit this.

[0096] Further, a first gap (not marked in the figure) is formed between the two first guide rollers 317, and a second gap is formed between the two second guide rollers 326. The first gap is used to limit the rotation radius of the first connecting plate 314 relative to the first drive shaft 311, and the second gap is used to limit the rotation radius of the second connecting plate 324 relative to the second drive shaft 321.

[0097] Since the upper and lower parts of the first connecting plate 314 are respectively connected to the first driving shaft 311 and the first roller 316, the frictional force generated between the first roller 316 and the first guiding groove 212, and the driving force generated by the first transmission member 313 on the first guiding member 211 are opposite in direction. Similarly, the frictional force generated between the second roller 325 and the second guiding groove 222, and the driving force generated by the second transmission member 323 on the second guiding member 221 are also opposite in direction. During the movement of the tarpaulin cover 100 along the contour of the tarpaulin frame 200, this connection structure is likely to cause a certain degree of deflection of the first connecting plate 314 relative to the first crawling seat 312, and the second connecting plate 324 relative to the second crawling seat 322. At this time, if the self-deflection of the first connecting plate 314 and the second connecting plate 324 is not restricted by the first guiding roller 317 and the second guiding roller 326 respectively, it is very likely to cause interference between the first roller 316 and the first guiding groove 212, and between the second roller 325 and the second guiding groove 222, thus hindering the normal operation of the crawling mechanism 300, and further leading to the failure of the relative movement between the tarpaulin cover 100 and the tarpaulin frame 200.

[0098] In view of this, in the present application, the rotation radii of the first connecting plate 314 relative to the first driving shaft 311 and the second connecting plate 324 relative to the second driving shaft 321 are restricted by the first gap and the second gap formed between the two first guiding rollers 317 and the two second guiding rollers 326, so as to ensure the smooth operation of the crawling mechanism 300, and further realize the stability of the relative movement between the tarpaulin cover 100 and the tarpaulin frame 200. Among them, regarding the specific sizes of the first gap and the second gap, they can be reasonably set according to the sizes of the first connecting plate 314 and the second connecting plate 324, and the present application does not limit this.

[0099] In some embodiments, referring to Figure 7 and Figure 8 , and Figure 10 and Figure 11 as shown, the tarpaulin frame 200 further has a vertical post 230 respectively connected to the bottom ends of the first cross bar 210 and the second cross bar 220, and a turning door 240 provided on the side of the tarpaulin frame 200. The turning door 240 includes a door body 241, a rotating rod 242 and a telescopic member 243. A guiding member 2411 respectively cooperating with the first guiding groove 212 and the second guiding groove 222 is provided at the top of the door body 241. The two ends of the rotating rod 242 are respectively rotatably connected to the door body 241 and the vertical post 230; the two ends of the telescopic member 243 are respectively rotatably connected to the door body 241 and the tarpaulin frame 200, and as the telescopic member 243 expands and contracts, the guiding member 2411 can move along the extending directions of the first guiding groove 212 and the second guiding groove 222, so as to realize the turning of the door body 241 between the side and the top of the tarpaulin frame 200.

[0100] It should be noted that, in order to further improve the loading and unloading capacity of the truck tarpaulin system for goods in multiple scenarios, especially to enable it to load and unload large-sized goods. Preferably, the upright post 230 in the tarpaulin rack 200 can be a telescopic upright post, so that the height of the tarpaulin rack 200 can be adjusted, which is beneficial to the loading and unloading of large-sized goods. Among them, the telescopic upright post usually includes a telescopic sleeve and a hydraulic mechanism for driving the telescopic sleeve. According to the different telescopic directions, it can be divided into a unidirectional telescopic upright post and a bidirectional telescopic upright post; according to the number of hydraulic mechanisms provided, it can be divided into a single-cylinder telescopic upright post and a double-cylinder telescopic upright post, etc.

[0101] In addition, the present application realizes the flipping of the flipping door 240 between the side and the top of the tarpaulin rack 200 through the cooperation between the guiding member 2411 and the first guiding groove 212 and the second guiding groove 222. Among them, in order to improve the smoothness of the flipping process of the flipping door 240 and avoid interference that may occur during the flipping process of the flipping door 240 to the greatest extent. Preferably, both the first cross bar 210 and the second cross bar 220 can include a horizontal section (not marked in the figure), a vertical section (not marked in the figure), and a curved section (not marked in the figure) respectively connected to the horizontal section and the vertical section. The first guiding groove 212 and the second guiding groove 222 respectively penetrate the side walls of the first cross bar 210 and the second cross bar 220 corresponding to the horizontal section, the vertical section, and the curved section. The first cross bar 210 and the second cross bar 220 with such a structure can make the movement process of the guiding member 2411 in the first guiding groove 212 and the second guiding groove 222 smoother, which is beneficial to the efficient flipping of the flipping door 240, and further improves the convenience and safety of loading and unloading goods.

[0102] It should also be noted that the rotating rod 242 rotatably connected to both the door body 241 and the upright post 230 can be a fixed rod or a telescopic rod. Among them, the fixed rod has higher structural strength, so that it can better support the flipping movement process of the door body 241; the telescopic rod can better adapt to the flipping trajectory of the door body 241 due to its telescopic function, so as to adapt to the flipping door 240 with different rotation radii. The present application does not limit the specific structure of the rotating rod 242. In addition, the telescopic member 243, as a component for driving the door body 241 to flip, can be an electric push rod, a hydraulic cylinder, a pneumatic cylinder, etc. The present application also does not limit the specific structure of the telescopic member 243.

[0103] In addition, regarding the number and configuration method of the flipping doors 240, the present application can have multiple different implementation manners. In one implementation manner, there can be two flipping doors 240, and the two flipping doors 240 are respectively disposed on both sides of the tarpaulin rack 200, so as to enable the opening and closing on both sides of the tarpaulin rack 200; in another implementation manner, for a truck carriage with an extended size, multiple flipping doors 240 can be arranged in parallel on one side of the tarpaulin rack 200, such as two flipping doors 240, three flipping doors 240, etc.

[0104] In some embodiments, with continued reference to Figure 7 and Figure 8 as shown, the tarpaulin rack 200 further includes side bars 260 respectively connected to the first cross bar 210 and the second cross bar 220, and a pushing member 261 disposed on the side bar 260. The pushing member 261 can abut against the edge of the door body 241, so that the door body 241 can perform horizontal movement along the first guiding groove 212 and the second guiding groove 222. Preferably, the pushing member 261 can be an electric push rod, a hydraulic cylinder, a pneumatic cylinder, etc., and the present application does not limit the specific structure of the pushing member 261.

[0105] When the door body 241 flips from the top of the tarpaulin rack 200 to the side, if only driven by the telescopic movement of the telescopic member 243, it is very likely that the smooth flipping of the door body 241 cannot be achieved. Therefore, in the present application, the pushing member 261 is disposed on the side bar 260, and the pushing direction of the pushing member 261 is perpendicular to the side bar 260, so that the pushing member 261 can smoothly transfer the pushing force to the door body 241; moreover, the pushing member 261 is in linkage cooperation with the guiding member 2411 and the telescopic member 243, thereby further optimizing the movement trajectory of the door body 241, and further improving the smoothness of the flipping process of the door body 241.

[0106] Optionally, there can be multiple pushing members 261, and the multiple pushing members 261 are spaced apart on the side bar 260. The arrangement of the multiple pushing members 261 can make the pushing force be transferred to the door body 241 more evenly, thus facilitating the synchronous start of the flipping movement of the door body 241.

[0107] In some embodiments, with reference to Figure 12 as shown, the tarpaulin rack 200 further has tensioners 250 respectively disposed on the first cross bar 210 and the second cross bar 220, and the tensioner 250 includes a connecting sleeve 251, a fixed seat 252 and an adjusting screw 253. Among them, the connecting sleeve 251 is respectively connected to the ends of the first guiding member 211 and the second guiding member 221. The fixed seat 252 is located below the connecting sleeve 251, and the fixed seat 252 is provided with a threaded hole (not marked in the figure); the adjusting screw 253 can pass through the threaded hole and be rotatably connected to the connecting sleeve 251, and the adjusting screw 253 is matched with the threaded hole to adjust the distance between the connecting sleeve 251 and the fixed seat 252.

[0108] It should be noted that although the first guide member 211 and the second guide member 221 in this application can be directly fixed to the surfaces of the first cross bar 210 and the second cross bar 220 by means such as welding and integral molding connection. However, after the truck tarpaulin system has been running for a long time, the relative forces generated between the first transmission member 313 and the first guide member 211, and between the second transmission member 323 and the second guide member 221 may affect the stability of the first guide member 211 and the second guide member 221. In view of this, in this application, the tensioner 250 is provided to adjust the tightness of the first guide member 211 and the second guide member 221, thereby facilitating the improvement of the stability and reliability of the movement process of the crawling mechanism 300 relative to the tarpaulin frame 200. Moreover, when the tensioner 250 is configured in the tarpaulin frame 200, the first guide member 211 and the first cross bar 210, and the second guide member 221 and the second cross bar 220 may not be connected by welding, that is, both the first guide member 211 and the second guide member 221 can be directly laid on the surfaces of the first cross bar 210 and the second cross bar 220.

[0109] Optionally, the number of tensioners 250 can be multiple, and the multiple tensioners 250 are respectively arranged corresponding to the ends of multiple first guide members 211 and multiple second guide members 221. This setting method enables the user to flexibly adjust the tension of the first guide member 211 and the second guide member 221, so that the two have appropriate tension, to reduce the wear of the transmission components to a certain extent and extend the service life of the transmission components.

[0110] In some embodiments, continue to refer to Figure 12 As shown, reinforcing portions 270 are provided on the outer walls of both the first cross bar 210 and the second cross bar 220. Among them, the reinforcing portion 270 can be a reinforcing plate, a reinforcing beam, a reinforcing pipe, etc., and this application does not limit the specific structure of the reinforcing portion 270.

[0111] During the installation and movement of the tarpaulin cover 100, the first cross bar 210 and the second cross bar 220 need to bear a certain amount of tensile and compressive forces. The setting of the reinforcing portion 270 can prevent the first cross bar 210 and the second cross bar 220 from deforming, ensure the structural stability of the entire tarpaulin system, and improve the reliability and durability of the system.

[0112] In addition, an embodiment of the present invention further provides a truck tarpaulin system, which is applied to the above-mentioned truck carriage. The truck tarpaulin system includes:

[0113] A tarpaulin cover 100 having a first cross beam 110 and a second cross beam 120 arranged opposite to each other;

[0114] A tarpaulin frame 200 that matches the tarpaulin cover 100;

[0115] The crawling mechanism 300 includes

[0116] The first crawler 310 disposed on the first cross beam 110 has a first drive shaft 311, and a first ratchet portion 3111 is disposed at the end of the first drive shaft 311;

[0117] The second crawler 320 disposed on the second cross beam 120 has a second drive shaft 321, and a second ratchet portion 3211 is disposed at the end of the second drive shaft 321;

[0118] The synchronizing shaft 330 has engaging portions 331 disposed at both ends thereof, and the engaging portions 331 can respectively engage with the first ratchet portion 3111 and the second ratchet portion 3211 to achieve synchronous transmission between the first crawler 310 and the second crawler 320.

[0119] In the specification provided herein, a large number of specific details are set forth. It will be understood, however, that embodiments of the invention may be practiced without these specific details. Similarly, in order to streamline the present invention and assist in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Among them, the claims following the specific implementation manner are hereby expressly incorporated into the specific implementation manner, where each claim itself serves as a separate embodiment of the present invention.

[0120] It should be noted that the above embodiments illustrate the present invention rather than limit the present invention, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices may be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be construed as limiting the order of execution.

Claims

1. A freight car carriage, characterized in that, Comprising a box body and a truck tarpaulin system provided on the box body, the truck tarpaulin system includes: A tarpaulin cover having a first cross beam and a second cross beam arranged oppositely; A tarpaulin frame matching the tarpaulin cover; A crawling mechanism including A first crawler provided on the first cross beam, having a first drive shaft, and a first ratchet portion is provided at the end of the first drive shaft; A second crawler provided on the second cross beam, having a second drive shaft, and a second ratchet portion is provided at the end of the second drive shaft; A synchronous shaft with mating portions provided at both ends, and the mating portions can respectively mesh with the first ratchet portion and the second ratchet portion to achieve synchronous transmission between the first crawler and the second crawler.

2. The truck carriage according to claim 1, characterized in that, The first ratchet portion and the second ratchet portion are respectively external teeth formed on the surface of the first drive shaft and the surface of the second drive shaft, and the mating portion is internal teeth formed at both ends of the synchronous shaft.

3. The truck carriage according to claim 1, characterized in that, A driving wheel is provided at the end of the first drive shaft, a driven wheel is provided at the end of the second drive shaft, the first ratchet portion is a driving tooth formed on the surface of the driving wheel, and the second ratchet portion is a driven tooth formed on the surface of the driven wheel; Drive wheels are respectively provided at both ends of the synchronous shaft, and the mating portion is a transmission tooth formed on the surface of the drive wheel.

4. The freight car carriage according to claim 3, characterized in that, There are two synchronous shafts, and the two synchronous shafts are respectively rotatably connected to the first crawler and the second crawler, and the transmission teeth at both ends of the two synchronous shafts respectively mesh with the driving teeth and the driven teeth.

5. The freight car carriage according to claim 1, characterized in that, The tarpaulin frame has a first cross bar located below the first cross beam and a first guiding member provided on the surface of the first cross bar, and a first guiding groove is provided on the first cross bar; The first crawler includes: A first crawling seat connected to the first cross beam, and the first drive shaft is arranged along the center line of the first crawling seat; A first transmission member coaxially arranged outside the first drive shaft, and the first transmission member can cooperate with the first guiding member; A first connecting plate, the upper part is rotatably connected to the first drive shaft, and the lower part is provided with a first roller cooperating with the first guiding groove; A driving member connected to the first drive shaft, and under the drive of the driving member, the first drive shaft, the synchronous shaft and the second drive shaft are synchronously driven so that the tarpaulin cover can move along the extending direction of the guiding member.

6. The freight car carriage according to claim 5, characterized in that, The tarpaulin frame has a second cross bar located below the second cross beam and a second guiding member provided on the surface of the second cross bar, and a second guiding groove is provided on the second cross bar; The second crawler includes: A second crawling seat connected to the second cross beam, and the second drive shaft is arranged along the center line of the second crawling seat; A second transmission member coaxially arranged outside the second drive shaft, and the second transmission member can cooperate with the second guiding member; A second connecting plate, the upper part is rotatably connected to the second drive shaft, and the lower part is provided with a second roller cooperating with the second guiding groove.

7. The freight car compartment according to claim 6, characterized in that, The first crawler further includes a first guiding roller rotatably connected to the first crawler seat, the second crawler further includes a second guiding roller rotatably connected to the second crawler seat, and the first guiding roller and the second guiding roller can respectively contact the first guiding member and the second guiding member.

8. The truck carriage according to claim 7, wherein, The tarpaulin frame further has upright posts respectively connected to the bottom ends of the first cross bar and the second cross bar, and a flip door provided on the side of the tarpaulin frame, and the flip door includes: A door body, with guiding members respectively provided at the top and cooperating with the first guiding groove and the second guiding groove; A rotating rod, with two ends respectively rotatably connected to the door body and the upright post; An expansion member, with two ends respectively rotatably connected to the door body and the tarpaulin frame, and as the expansion member expands and contracts, the guiding member can move along the extending directions of the first guiding groove and the second guiding groove, so as to realize the flipping of the door body between the side and the top of the tarpaulin frame.

9. The truck carriage according to claim 7, characterized in that, The tarpaulin frame further has tensioners respectively provided on the first cross bar and the second cross bar, and the tensioner includes: A connecting sleeve, respectively connected to the ends of the first guiding member and the second guiding member; A fixed seat located below the connecting sleeve, provided with a threaded hole; An adjusting screw rod, passing through the threaded hole and rotatably connected to the connecting sleeve, and the adjusting screw rod is matched with the threaded hole to adjust the distance between the connecting sleeve and the fixed seat.

10. A truck tarpaulin system is applied to the truck carriage as described in any one of claims 1-9, characterized in that, The truck tarpaulin system includes: A tarpaulin cover, having a first cross beam and a second cross beam arranged oppositely; A tarpaulin frame, matching with the tarpaulin cover; A crawling mechanism, including A first crawler provided on the first cross beam, having a first driving shaft, and a first toothed portion provided at the end of the first driving shaft; A second crawler provided on the second cross beam, having a second driving shaft, and a second toothed portion provided at the end of the second driving shaft; A synchronous shaft, with mating portions respectively provided at two ends, and the mating portions can respectively mesh with the first toothed portion and the second toothed portion to realize the synchronous transmission between the first crawler and the second crawler.

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