A lifting drive mechanism and lifting system for the canopy of a high-sided truck

Abstract

This invention discloses a lifting drive mechanism and lifting system for a high-sided truck cover. The lifting drive mechanism includes a reducer, a drive shaft, and a drive sprocket. The drive shaft is connected to the reducer, and the drive sprocket is mounted on the drive shaft. The high-sided truck includes a cargo box with a floor plate, and the drive shaft is rotatably positioned below the floor plate. The lifting system includes a canopy, front lifting columns, rear lifting columns, and a lifting drive mechanism. The cargo box is equipped with column guide rails that guide the front and rear lifting columns. The front and rear lifting columns move up and down under the action of the front and rear transmission mechanisms, respectively. At least one set of central lifting columns and a central column rail that guides their movement are also provided in the middle of the cargo box. This invention has a simple structure, employs concealed lifting transmission from bottom to top, from outside to inside, and from the rear to the front of the cargo box, enabling long-distance transmission with no exposed parts. It offers reliable transmission, flexibility, and low cost, significantly reducing user operating costs.

Description

Technical Field

[0001] This invention relates to a lifting drive mechanism and lifting system for the canopy of a high-sided truck, belonging to the field of transportation vehicle technology. Background Technology

[0002] High-sided transport trucks, also known as cargo vans, have a basket-like frame structure on both sides of the chassis. The top of the cargo box is not covered. These high-sided trucks come in various lengths and models. They are responsible for the main task of road transportation and are one of the important transport vehicles in the logistics field.

[0003] High-sided trucks commonly encounter a difficult yet unavoidable problem during loading and unloading: the cargo they carry is often uneven, and the truck bed itself is quite large. Therefore, the cargo must be covered with tarpaulins before transport. However, unfolding, covering, and folding the tarpaulins is time-consuming, laborious, and unsafe. Furthermore, multiple tarpaulin poles are inserted across the top of the truck bed, fixing the height of the tarpaulin. When loading or unloading large or oddly shaped cargo, the tarpaulin cannot be raised to make room, causing trouble or even making loading impossible. Sometimes, a large section of the top of the truck bed is left empty, forcing the truck to leave, increasing the owner's transportation costs and wasting transportation resources.

[0004] Furthermore, forklifts are mostly used for loading and unloading goods on vehicles, but the existing roof supports are all inserted into the corresponding flower racks. When the forklifts lift the goods, they cannot be lifted and can only be moved manually, resulting in a large amount of labor costs.

[0005] While existing electric lifting tarpaulins can achieve automatic raising and lowering of the tarpaulin, their structures are complex and costly, and their electrical control systems are prone to problems. During use, there may be situations where the tarpaulin cannot extend or retract properly or cannot be raised or lowered to the correct position. Therefore, there is a need for a high-sided truck tarpaulin pole lifting drive mechanism and lifting system that is simple in structure, low in cost, and can meet the synchronous raising and lowering requirements of the tarpaulin support. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing a lifting drive mechanism and lifting system for the canopy of a high-sided truck that is structurally sound, low-cost, easy to drive, meets the requirements for synchronous lifting of the canopy, does not affect the sideboards of the high-sided truck or the loading and unloading of goods, and can be lifted and lowered.

[0007] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: A lifting drive mechanism for the roof of a high-sided truck includes a reducer, a drive shaft and two sets of drive sprockets. The drive shaft is connected to the output end of the reducer. The two sets of drive sprockets are respectively arranged on the drive shaft on the left and right sides of the reducer. The high-sided truck includes a cargo box, the cargo box includes a floor plate, the drive shaft is rotatably arranged below the floor plate, and the drive sprockets include a front drive sprocket and a rear drive sprocket.

[0008] The beneficial effects of this invention are as follows: the two ends of the drive shaft are respectively located below the base plate via bearings, and the lifting drive mechanism is located below the base plate. The concealed lifting drive mechanism will not affect the frame of the high-sided truck or the loading and unloading of goods in the cargo compartment. Moreover, it can transmit power from bottom to top, from outside to inside, and from the rear to the front of the cargo compartment over long distances. It is flexible, versatile, and inexpensive, greatly reducing the user's operating costs. The lifting drive mechanism can achieve synchronous lifting and driving of multiple canopy supports.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the speed reducer is a hand-cranked speed reducer.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the operator can control the lifting of the lifting column and the vehicle cover by cranking the reducer with one hand. It is easy, convenient, easy to master, and inexpensive. There is no need to worry about the tarpaulin cover getting stuck during loading and unloading due to quality problems with the electrical equipment, as is often the case with electric automatic tarpaulin covers.

[0012] Furthermore, the reducer is located on the lower left or right side of the rear end of the base plate, and the drive shaft includes a left drive shaft and a right drive shaft, which are respectively connected to the left output end and the right output end of the reducer.

[0013] The advantage of adopting the above-mentioned further solution is that the speed reducer is offset to avoid the position of the license plate at the rear of the vehicle.

[0014] This invention also relates to a high-sided truck cover lifting system, including a cover and front and rear lifting columns for driving the cover to rise and fall. It also includes the high-sided truck cover lifting drive mechanism as described above. The truck body is provided with column guide rails to guide the front and rear lifting columns. The front lifting column is connected to the front drive sprocket through a front transmission mechanism, and the rear lifting column is connected to the rear drive sprocket through a rear transmission mechanism. The front and rear lifting columns rise and fall under the action of the front and rear transmission mechanisms, respectively.

[0015] The beneficial effects of this invention are as follows: Clockwise rotation of the reducer drives the front and rear drive sprockets via the front and rear transmission mechanisms, thereby driving the front lifting column at the front of the truck bed and the rear lifting column at the rear of the truck bed. This raises the four columns at the four corners of the truck bed, and lowers them, achieving the requirement of synchronous lifting and lowering of multiple canopy supports. Since the truck bed canopy is fixed on the four lifting columns, the hand-cranked reducer simultaneously drives the lifting columns and canopy at the four corners of the truck bed to rise and fall simultaneously, completing the raising and lowering of the canopy cover. The front and rear transmission mechanisms complete long-distance transmission from the rear to the front of the truck bed. There are no exposed parts, the price is low, the transmission is reliable, and there will be no lifting jamming or malfunction. Drivers no longer need to climb onto the roof to put on or take off the canopy, eliminating the risk of injury or death from falling from the roof. It eliminates the dirty and tiring physical labor of pulling canopies at heights, saving a significant amount of time and energy. Forklifts can easily load and unload goods, greatly reducing loading and unloading costs.

[0016] Based on the above technical solution, the present invention can be further improved as follows.

[0017] Furthermore, the front transmission mechanism includes a front bottom corner left guide wheel, a front bottom corner right guide wheel, a front top corner left guide wheel, a front top corner right guide wheel, a return wheel, and a front transmission traction rope. One end of the front transmission traction rope, which rotates on the front drive sprocket, passes around the front bottom corner right guide wheel, the front top corner right guide wheel, the return wheel, the front top corner left guide wheel, the front bottom corner left guide wheel, and the front drive sprocket to connect with its other end to form a closed loop. The front bottom corner left guide wheel and the front bottom corner right guide wheel are located on the outside of the carriage, the front top corner left guide wheel and the front top corner right guide wheel are located above the front panel of the carriage, the return wheel is located inside the carriage, and the lower end of the front lifting column is connected to the front transmission traction rope through a connector.

[0018] The beneficial effect of adopting the above-mentioned further solution is that the connecting piece is connected to the return wheel and the front top corner left guide wheel via a front drive traction rope. The return wheel is located inside the cavity of the car body's upright post. The front bottom corner left guide wheel and the front bottom corner right guide wheel are located in front of the front panel of the car body and below the floor panel. The front drive sprocket rotates synchronously with the drive shaft and transmits power to the bottom corner guide wheel at the front of the car body through the front drive traction rope passing through the back of the car body chassis. After passing through the bottom corner guide wheel, the front drive traction rope is transmitted to the return wheel via the top corner guide wheel. The front lifting column is connected to the front drive traction rope in the vertical direction, thereby realizing the driving of the front lifting column's rising or falling action. The lifting column and column guide rail are located at the upright post position at the front of the car body using a concealed transmission method with no exposed parts. On the one hand, this makes full use of the existing structure of the car body without modifying the car body, reducing costs; on the other hand, it avoids affecting the loading and unloading of goods inside the car body.

[0019] Furthermore, the rear transmission mechanism includes a rear internal guide wheel and a rear transmission traction rope. The rear transmission traction rope is wrapped around the rear drive sprocket and the rear internal guide wheel. The rear internal guide wheel is located inside the carriage. The rear lifting column is connected to the rear transmission traction rope.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the rear drive chain passes through the bottom plate and wraps around the rear built-in guide wheel. The rear lifting column rises or falls under the guidance of the column guide rail and the transmission of the rear drive traction rope, realizing the power transmission of the rear lifting column. The rear built-in guide wheel, column guide rail and rear lifting column at the post position in the carriage make full use of the existing structure of the carriage without modifying the carriage, reducing costs, and avoid affecting the loading and unloading of goods in the carriage.

[0021] Furthermore, the middle section of the carriage is provided with at least one set of central lifting columns and a central column track for guiding the lifting of the central lifting columns. The set of central lifting columns is respectively arranged on the left and right sides of the carriage. The upper end of the central lifting column is connected to the canopy. The central lifting column moves up and down under the action of the central transmission mechanism. The central transmission mechanism includes a first steering wheel, a second steering wheel, and a centrally built-in guide wheel. The side of the carriage is correspondingly provided with a central column track for guiding the central lifting columns. The first steering wheel and the second steering wheel are located below the floor plate. The conveying section of the front drive traction rope passes around the first steering wheel, the centrally built-in guide wheel, and the second steering wheel in sequence. The lower end of the central lifting column is connected to the vertical section in the middle of the front drive traction rope through a connector.

[0022] The beneficial effects of adopting the above-mentioned further solution are that, specifically, the connecting piece is connected to the front drive traction rope located between the centrally built-in guide wheel and the first steering wheel, or the connecting piece is connected to the front drive traction rope between the centrally built-in guide wheel and the second steering wheel. For longer vehicles, a lifting column can be added in the middle to ensure the stability of the central support during the canopy support process. The lifting action of the central lifting column is guided by the central column rail and driven by the front drive traction rope. A steering wheel is set, which is located at the bottom of the floor to avoid affecting the goods in the carriage. The front drive traction rope passes through the floor and is wrapped around the centrally built-in guide wheel. The central lifting column is connected to the vertically directed front drive traction rope to drive the lifting action of the central lifting column. The centrally built-in guide wheel, the central lifting column, and the central column rail are located at the upright position in the carriage. On the one hand, this makes full use of the existing structure of the carriage to meet the support strength requirements without modifying the carriage, reducing costs. On the other hand, it avoids affecting the loading and unloading of goods in the carriage.

[0023] Furthermore, the carriage includes a side panel, and the front, middle and rear parts of the side panel are respectively provided with a front receiving cavity, a middle receiving cavity and a rear receiving cavity. The front lifting column, the front column guide rail and the return wheel are arranged in the front receiving cavity. The middle lifting column, the middle column rail and the middle built-in guide wheel are arranged in the middle receiving cavity. The rear lifting column, the rear column guide rail and the rear built-in guide wheel are arranged in the rear receiving cavity.

[0024] The beneficial effects of adopting the above-mentioned further solution are that the receiving cavity is set at the position of the upright pile of the carriage, and a hidden transmission method is adopted with no exposed parts. On the one hand, it makes full use of the existing structure of the carriage, which not only meets the requirements of support strength, but also does not require modification of the carriage, thus reducing costs. On the other hand, it avoids affecting the loading and unloading of goods in the carriage.

[0025] Furthermore, the canopy includes multiple canopy poles and a canopy cover mounted on the canopy poles. A canopy track is provided between the front lifting column and the rear lifting column located on the same side, and the two ends of the canopy poles are slidably mounted on the canopy track.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the front lifting column and the rear lifting column, or the front, rear lifting columns and the middle lifting column, are used to support the canopy track, and the canopy rod can slide along the canopy track, thereby realizing the raising and lowering of the canopy.

[0027] Furthermore, both the front drive traction rope and the rear drive traction rope include a chain segment that meshes with the sprocket and a wire rope segment that cooperates with the guide wheel.

[0028] The advantages of adopting the above-mentioned further solution are that using steel wire rope and chain results in better synchronization, safer and more reliable transmission, greater flexibility, and lower cost, thus greatly reducing user operating costs.

[0029] Furthermore, both ends of the canopy pole are connected to the canopy track via pulleys.

[0030] The beneficial effect of adopting the above-mentioned further solution is that the awning rods slide more smoothly on the awning track when the awning is unfolded or retracted. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the lifting drive mechanism of the present invention;

[0032] Figure 2 This is a schematic diagram of the lifting system of the present invention;

[0033] Figure 3 This is a schematic diagram of the front and rear transmission mechanisms of the present invention;

[0034] Figure 4 This is a schematic diagram of the front, middle and rear transmission mechanisms of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the cavity on the carriage of the present invention;

[0036] Figure 6 This is a schematic diagram of the structure of the front lifting column and the column guide rail of the present invention.

[0037] In the diagram, 1. Reducer; 2. Drive shaft; 3. Front drive sprocket; 4. Rear drive sprocket; 5. Canopy pole; 6. Canopy cover; 7. Front lifting column; 8. Rear lifting column; 9. Canopy cover track; 10. Trolley; 11. Column guide rail; 12. Rear internal guide wheel; 13. Rear drive traction rope; 14. Front bottom right guide wheel; 15. Front top right guide wheel; 16. Return wheel; 17. Front top left guide wheel; 18. Front bottom left guide wheel; 19. Front drive traction rope; 20. Middle lifting column; 21. Middle column track; 22. First steering wheel; 23. Middle internal guide wheel; 24. Second steering wheel; 25. Front receiving cavity; 26. Rear receiving cavity; 27. Middle receiving cavity; 28. Carriage; 29. ​​Floor plate; 30. Pulley. Detailed Implementation

[0038] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0039] like Figure 1 As shown, a lifting drive mechanism for the roof of a high-sided truck includes a reducer 1, a drive shaft 2, and two sets of drive sprockets. The drive shaft 2 is connected to the output end of the reducer 1. The two sets of drive sprockets are respectively disposed on the drive shaft 2 on the left and right sides of the reducer 1. The high-sided truck includes a cargo box 28, and the cargo box includes a floor 29. The drive shaft is rotatably disposed at the bottom of the floor 29. The drive sprockets include a front drive sprocket 3 and a rear drive sprocket 4.

[0040] The reducer 1 is a hand-cranked reducer 1. The operator can control the lifting of the lifting column and the vehicle cover by cranking the reducer 1 with one hand. It is easy, convenient, and easy to master. It is also inexpensive. There is no need to worry about the problem of the tarpaulin cover getting stuck during loading and unloading due to quality problems with the electrical equipment of electric automatic tarpaulin covers.

[0041] The reducer 1 is located below the rear end of the base plate, slightly to the left or right. The drive shaft 2 includes a left drive shaft and a right drive shaft, which are respectively connected to the left and right output ends of the reducer. The reducer is offset to avoid the position of the license plate at the rear of the vehicle.

[0042] like Figures 2-6As shown, the present invention also relates to a high-sided truck cover lifting system, including a cover and a front lifting column 7 and a rear lifting column 8 for driving the cover to rise and fall. It also includes the high-sided truck cover lifting drive mechanism as described above. The truck body is provided with column guide rails 11 for guiding the front lifting column 7 and the rear lifting column 8. The front lifting column 7 is connected to the front drive sprocket 3 through a front transmission mechanism, and the rear lifting column 8 is connected to the rear drive sprocket 4 through a rear transmission mechanism. The front and rear lifting columns 8 rise and fall under the action of the front and rear transmission mechanisms, respectively.

[0043] The front drive mechanism includes a front bottom corner left guide wheel 18, a front bottom corner right guide wheel 14, a front top corner left guide wheel 17, a front top corner right guide wheel 15, a return wheel 16, and a front drive traction rope 19. One end of the steel wire rope wound on the front drive sprocket passes around the front bottom corner right guide wheel 14, the front top corner right guide wheel 15, the return wheel 16, the front top corner left guide wheel 17, the front bottom corner left guide wheel 18, and the front drive sprocket 3, and is connected to the other end of the steel wire rope to form a closed loop. The front bottom corner left and right guide wheels are located below the floor plate and in front of the front panel of the carriage. The front top corner left and right guide wheels are located above the front panel of the carriage. The return wheel is located inside the carriage. There is a front receiving cavity 25 at the front upright of the side panel of the carriage. The return wheel 16, the front lifting column 7, and the column guide rail 11 are located in the front receiving cavity 25. The lower end of the front lifting column is connected to the front drive traction rope through a connector. The specific connecting component is the front drive traction rope connecting the return wheel and the front top corner left guide wheel. The front drive sprocket 3 rotates synchronously with the drive shaft 2, and transmits power to the bottom corner guide wheel at the front of the car body through the front drive traction rope 19 passing through the back of the chassis. After passing through the bottom corner guide wheel, the front drive traction rope 19 transmits power to the return wheel 16 through the top corner guide wheel. The front lifting column 7 is connected to the front drive traction rope 19 in the vertical direction, thereby realizing the driving of the front lifting column 7 to rise or fall.

[0044] The rear transmission mechanism includes a rear internal guide wheel 12 and a rear transmission traction rope 13. The rear transmission traction rope 13 is wrapped around the rear drive sprocket 4 and the rear internal guide wheel 12. The rear internal guide wheel 12 is rotatably mounted inside the carriage. A rear receiving cavity 26 is located at the rear upright of the side panel of the carriage. The rear internal guide wheel 12 and the column guide rail 11 of the rear lifting column 8 are disposed within the rear receiving cavity 26. The lower part of the rear lifting column 8 is connected to the rear transmission traction rope 13 located above the bottom plate. The rear drive sprocket 4 passes through the bottom plate and wraps around the rear internal guide wheel 12. The rear lifting column 8 rises or falls under the guidance of the column guide rail 11 and the transmission action of the rear transmission traction rope 13, realizing the power transmission of the rear lifting column 8 and simultaneously achieving synchronous lifting of the front and rear lifting columns.

[0045] The middle section of the carriage is also provided with at least one set of central lifting columns 20 and central column rails 21 for guiding the lifting of the central lifting columns 20. One set of central lifting columns 20 is respectively arranged on the left and right sides of the carriage. The upper end of each central lifting column 20 is connected to the canopy. The central lifting columns 20 move up and down under the action of a corresponding central transmission mechanism. The central transmission mechanism includes a first steering wheel 22, a second steering wheel 24, and a centrally located guide wheel 23. The sides of the carriage are correspondingly provided with guide rails 21 for guiding the central lifting columns 20. The column track 21, the first steering wheel and the second steering wheel are set on the bottom surface of the car body floor. The middle pile of the side of the car body has a middle receiving cavity 27. The middle internal guide wheel 23, the middle lifting column 20 and the middle column track 21 are set in the middle receiving cavity 27. The conveying section of the front drive traction rope 19 passes around the first steering wheel 22, the middle internal guide wheel 23 and the second steering wheel 24 in sequence and winds around the front bottom corner right guide wheel 14. The lower end of the middle lifting column is connected to the vertical section of the middle of the front drive traction rope through a connector. Specifically, the connector is connected to the front drive traction rope located between the centrally built-in guide wheel and the first steering wheel. For longer vehicles, a lifting column can be added in the middle to ensure the stability of the central support during the canopy support process. The lifting action of the central lifting column is guided by the central column rail 21 and driven by the front drive traction rope 19. A hidden steering wheel is set, which is located below the floor to avoid interfering with the loading and unloading of goods in the carriage. The front drive traction rope 19 passes through the floor and is wrapped around the centrally built-in guide wheel 23. The central lifting column 20 is connected to the vertical front drive traction rope 19 to drive the lifting action of the central lifting column 20.

[0046] The carriage includes side panels, with a front receiving cavity 25, a middle receiving cavity 27, and a rear receiving cavity 26 respectively located on the front, middle, and rear parts of the side panels. The front lifting column 7, the front column guide rail 11, and the return wheel 16 are disposed within the front receiving cavity. The middle lifting column 20, the middle column rail 21, and the middle internal guide wheel 23 are disposed within the middle receiving cavity. The rear lifting column 8, the column guide rail 11, and the rear internal guide wheel 12 are disposed within the rear receiving cavity. The column guide rail or the middle column rail is disposed within the receiving cavity of the carriage's columns, making full use of the carriage's column positions and employing a concealed transmission method with no exposed parts. This not only fully utilizes the existing carriage structure to meet the support strength requirements but also eliminates the need for carriage modifications, reducing costs. Furthermore, it avoids affecting the loading and unloading of goods within the carriage.

[0047] The canopy includes multiple canopy poles 5 and a canopy cover 6 mounted on the poles. A canopy track 9 is provided between the front lifting column 7 and the rear lifting column 8 located on the same side. The two ends of the canopy poles are slidably mounted on the canopy track. The front and rear lifting columns, or the front, rear, and middle lifting columns, are used to support the canopy track. The canopy poles can slide along the canopy track, thereby realizing the raising and lowering of the canopy.

[0048] Both the front drive traction rope 19 and the rear drive traction rope 13 include a chain segment that meshes with the sprocket and a wire rope segment that cooperates with the guide wheel. Using a combination of wire rope and chain, the transmission can be carried out from bottom to top, from inside to outside, and from front to back over long distances. With no exposed parts, the transmission is reliable, flexible, and inexpensive, significantly reducing user costs.

[0049] Both ends of the canopy pole 5 are connected to the canopy track 9 via pulleys 10. When the canopy is opened or closed, the canopy pole slides more smoothly on the canopy track 9.

[0050] The column guide rail 11 and the middle column track both include slide rails and pulleys 30 mounted on the slide rails. The front lifting column 7, the middle lifting column 20, and the rear lifting column 8 all adopt C-shaped steel structures. The C-shaped steel structures have sliding grooves, and the pulleys are placed in the sliding grooves. This provides a guiding and limiting function for the lifting columns, while reducing friction between the lifting columns and the column guide rails and the middle column track, ensuring smoother lifting and lowering of the four corner lifting columns or more lifting columns, and providing a better guiding effect.

[0051] The traction drive consists of two parts: the front and rear of the carriage. The front section begins at the base of the front lifting column, where a steel cable is fixed and passes downwards around the return wheel. It then moves upwards along the front corner guide wheel at the top of the carriage post, down to the front bottom corner guide wheel, around the back of the carriage chassis, and finally onto the corresponding front drive sprocket at the rear of the carriage. This section of the steel cable becomes a chain that meshes with the front drive sprocket. It then returns along the same path, moving upwards to the front bottom corner guide wheel at the lower corner of the front of the carriage, then upwards to the front top corner guide wheel at the top corner of the carriage, and finally down to the return wheel at the bottom of the column, winding back to the base of the front lifting column. The cables converge and secure at the corners, forming a closed loop to complete the lifting and lowering function of the front of the carriage. The traction drive at the rear of the carriage starts at the base of the rear lifting column, where the steel cable is secured. It then travels upwards along the guide wheel at the rear corner behind the lifting column, passes around to the bottom of the column, and connects with the chain. The chain then passes through the carriage floor at the base of the column, interlocks with the rear drive sprocket on the drive shaft of the drive assembly behind the carriage floor, and then travels upwards through the carriage floor to connect with the steel cable. The steel cable continues upwards to converge and secure at the base of the rear lifting column, forming a closed loop to complete the lifting and lowering function of the rear column. Both the front and rear traction drives are simultaneously driven by a hand-cranked reducer, allowing the lifting columns and canopies at all four corners of the carriage to rise and fall simultaneously.

[0052] The lifting columns adopt a C-shaped steel structure and slide up and down in conjunction with the column guide rails or columns. They are respectively located at the four corners of the carriage, or at the four corners and the middle position. It is ensured that the four or more columns slide smoothly and stand upright when traction is encountered.

[0053] The lifting column is placed in the receiving cavity inside the carriage upright. The drive wheel is located at the bottom and outside of the carriage or inside the receiving cavity. The concealed traction drive uses steel wire rope and chain to transmit power from bottom to top, from inside to outside, and from front to back over long distances. There are no exposed parts, the transmission is reliable, flexible and versatile, and the price is low, which greatly reduces the user's operating costs.

[0054] The canopy track is located on the top of both sides of the carriage, with both ends fixed to the tops of the front and rear lifting columns. The trolley and angled canopy poles are integrated and rest on the track, with the tarpaulin covering multiple poles. The canopy rises and falls with the lifting columns, allowing for loading and unloading even in rain or snow. When loading or unloading with a crane, the tarpaulin can be pulled and folded at the front of the carriage, greatly facilitating loading and unloading. The operator can easily raise and lower the columns and canopy with a single hand crank of the reducer, making it easy and convenient to operate. It is also inexpensive, providing value to users. Unlike electric automatic tarpaulin covers, which often experience jamming due to electrical equipment defects during loading and unloading, this system eliminates concerns about potential problems with the tarpaulin covering.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting system for the roof of a high-sided truck, characterized in that, The vehicle includes a canopy and front lifting columns (7) and rear lifting columns (8) for driving the canopy's raising and lowering actions. It also includes a lifting drive mechanism for the canopy of a high-sided truck. This mechanism includes a reducer (1), a drive shaft (2), and two sets of drive sprockets. The drive shaft (2) is connected to the output end of the reducer (1). The two sets of drive sprockets are respectively mounted on the drive shaft (2). The drive sprockets include a front drive sprocket (3) and a rear drive sprocket (4). The high-sided truck includes a cargo box. The carriage includes a floor, and the drive shaft (2) is rotatably disposed below the floor; the carriage is provided with a column guide rail (11) for guiding the front lifting column (7) and the rear lifting column (8); the front lifting column (7) is connected to the front drive sprocket (3) through a front transmission mechanism, and the rear lifting column (8) is connected to the rear drive sprocket (4) through a rear transmission mechanism; the front lifting column and the rear lifting column (8) move up and down under the action of the front transmission mechanism and the rear transmission mechanism, respectively. The front drive mechanism includes a front bottom corner left guide wheel (18), a front bottom corner right guide wheel (14), a front top corner left guide wheel (17), a front top corner right guide wheel (15), a return wheel (16), and a front drive traction rope (19). One end of the front drive traction rope passes around the front bottom corner right guide wheel (14), the front top corner right guide wheel (15), the return wheel (16), the front top corner left guide wheel (17), the front bottom corner left guide wheel (18), and the front drive sprocket (3) and connects to its other end to form a closed loop. The front bottom corner left guide wheel and the front bottom corner right guide wheel are located on the outside of the carriage. The front top corner left guide wheel and the front top corner right guide wheel are located above the front panel of the carriage. The return wheel is located inside the carriage. The front lifting column (7) is connected to the vertical section of the front drive traction rope (19). The rear transmission mechanism includes a rear built-in guide wheel (12) and a rear transmission traction rope (13). The rear transmission traction rope (13) is wrapped around the rear drive sprocket (4) and the rear built-in guide wheel (12). The rear built-in guide wheel (12) is located inside the carriage. The rear lifting column (8) is connected to the rear transmission traction rope (13). The canopy includes multiple canopy poles (5) and a canopy cover (6) on the canopy poles. A canopy track (9) is provided between the front lifting column (7) and the rear lifting column (8) located on the same side. The two ends of the canopy poles are respectively slidably set on the canopy track. Both the front drive traction rope (19) and the rear drive traction rope (13) include a chain segment that meshes with the sprocket and a wire rope segment that cooperates with the guide wheel.

2. The high-sided truck cover lifting system according to claim 1, characterized in that, The speed reducer (1) is a hand-cranked speed reducer.

3. The high-sided truck cover lifting system according to claim 1 or 2, characterized in that, The reducer (1) is located on the lower left or right side of the rear end of the base plate. The drive shaft includes a left drive shaft and a right drive shaft, which are respectively connected to the left output end and the right output end of the reducer (1).

4. The high-sided truck cover lifting system according to claim 1 or 2, characterized in that, The middle section of the carriage is also provided with at least one set of central lifting columns (20) and a central column track (21) for guiding the lifting of the central lifting columns (20). The set of central lifting columns (20) is respectively arranged on the left and right sides of the carriage. The upper end of the central lifting column (20) is connected to the canopy. The central lifting column (20) moves up and down under the action of the central transmission mechanism. The central transmission mechanism includes a first steering wheel (22), a second steering wheel (24), and a centrally built-in guide wheel. (23) A central column track (21) is provided on the side of the carriage to guide the central lifting column (20). The first steering wheel (22) and the second steering wheel (24) are located on the back of the bottom plate of the carriage. The conveying section of the front drive traction rope (19) passes around the first steering wheel (22), the central guide wheel (23) and the second steering wheel (24) in sequence. The central lifting column (20) is connected to the vertical section in the middle of the front drive traction rope (19).

5. The high-sided truck cover lifting system according to claim 4, characterized in that, The carriage includes a side panel, and the front, middle and rear of the side panel are respectively provided with a front receiving cavity (25), a middle receiving cavity (27) and a rear receiving cavity (26). The front lifting column (7), the front column guide rail (11) and the return wheel (16) are arranged in the front receiving cavity (25). The middle lifting column (20), the middle column rail (21) and the middle built-in guide wheel (23) are arranged in the middle receiving cavity (27). The rear lifting column (8), the rear column guide rail (11) and the rear built-in guide wheel (12) are arranged in the rear receiving cavity (26).

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