Truck tarpaulin traction covering device

Abstract

The embodiment of the invention provides a truck tarpaulin traction covering device, and relates to the technical field of truck tarpaulin covering. A truck tarpaulin traction covering device comprises a bottom frame, a vertical cylinder is fixedly connected to the top of the bottom frame, top frames are arranged above the vertical cylinder, and hollow cavities are formed in the vertical cylinder and two of the top frames; piston cylinders are fixedly connected to the inner sides of the two sets of underframes, and a supply assembly is arranged on the outer sides of the piston cylinders and comprises a double-head motor fixed to the inner side of the vertical cylinder. Wherein the inner sides of the two top frames are provided with a traction assembly and a covering assembly which are used for traction and covering of the tarpaulin respectively, the traction assembly comprises a pressurizing tank fixed to the back face of the piston cylinder, and the covering assembly comprises a steel wire rope fixed to the back faces of the top frames. Based on a mechanical and pneumatic combined mode, the tarpaulin is rapidly and effectively dragged to cover goods in a truck hopper, and the covering efficiency of the tarpaulin is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of truck tarpaulin covering, and in particular relates to a truck tarpaulin traction and covering device. Background Art

[0002] Trucks, generally referred to as trucks or trucks, include dump trucks, tractor trucks, off-road trucks for off-road and roadless areas, and various vehicles manufactured for special needs. They refer to cars that are mainly used to transport goods, and sometimes also refer to cars that can tow other vehicles. They belong to the category of commercial vehicles and can generally be divided into heavy and light types according to the weight of the vehicle. Tarpaulin (or waterproof cloth) is a high-strength waterproof material with good toughness and softness. It is often used as canvas (oil canvas), polyester with polyurethane coating, or made into polyethylene plastics. Tarpaulins usually have sturdy grommets at the corners or edges to facilitate rope binding, hanging or covering.

[0003] In the prior art (the patent application with announcement number CN218478469U and patent name of a truck tarpaulin traction and covering device), an electric hoist is installed on a rail truss hanger, and a bracket and a support rod are installed below the rail truss hanger. The support rod is provided with a lifting ring and a hook. One side of the tarpaulin can be quickly installed on the support rod through the hook, and then the electric hoist is connected to the lifting ring to realize the rapid traction and installation of the tarpaulin, which has the advantages of convenient installation and lifting and strong practicality. In the process of implementing this technical solution, it is found that there are at least the following problems in the prior art.

[0004] According to the transportation requirements of the goods pulled by the truck, a tarpaulin is needed to cover the goods in the truck bed. Since the truck is relatively tall, covering with a tarpaulin is difficult and troublesome. It often requires the cooperation of several people to cover the tarpaulin on the truck. The tarpaulin cannot be quickly and effectively pulled to cover the goods in the truck bed based on a combination of mechanical and pneumatic methods, resulting in low covering efficiency of the tarpaulin and delaying the departure time of the truck. Summary of the invention

[0005] The present application aims to solve at least one of the technical problems in the prior art that the tarpaulin cannot be quickly and effectively pulled to cover the cargo in the truck bed by a combination of mechanical and pneumatic means, resulting in low covering efficiency of the tarpaulin and delaying the departure time of the truck. To this end, the present application proposes a truck tarpaulin pulling and covering device.

[0006] To achieve the above purpose, the specific technical solutions of the present invention are as follows:

[0007] A truck tarpaulin traction and covering device comprises a bottom frame, a vertical cylinder is fixedly connected to the top of the bottom frame, and a top frame is arranged above the vertical cylinder, and the vertical cylinder and two of the top frames are provided with a hollow cavity;

[0008] The inner sides of the two groups of base frames are fixedly connected with piston cylinders, and the outer sides of the piston cylinders are provided with supply components, and the supply components include a double-headed motor fixed on the inner side of the vertical cylinder;

[0009] The inner sides of two of the top frames are respectively provided with a pulling assembly and a covering assembly for pulling and covering the tarpaulin, and the pulling assembly includes a booster tank fixed on the back of the piston cylinder, and the covering assembly includes a steel wire rope fixed on the back of the top frame.

[0010] Preferably: the supply assembly also includes a first main bevel gear fixed on an output shaft of the double-headed motor, and a first slave bevel gear is meshed on one side of the first main bevel gear, the inner cavity of the first slave bevel gear is fixedly connected to a rotating rod, and both ends of the rotating rod are fixedly connected to swing arms, a connecting rod is movably connected to the swing arm, and the other end of the connecting rod is hinged with a piston that slides with the piston cylinder, the top of the piston cylinder is connected to a three-way valve, and the top of the three-way valve is connected to an intake pipe.

[0011] Preferably: the pulling assembly also includes an angle tube connected to the exhaust port of the three-way valve, and the angle tube is connected to the boosting tank, the first exhaust port of the boosting tank is connected to the first boosting pipe, and the top end of the first boosting pipe is connected to a telescopic tube, the top end of the telescopic tube is connected to a straight tube connected to and matched with two top frames with hollow cavities, and the top end of the straight tube is connected to a first pressure relief pipe with a first pressure relief valve, the front end of the straight tube is connected to a telescopic airbag embedded in the top frame, and the front end of the telescopic airbag is fixedly connected to a sliding seat that slides with the top frame.

[0012] Preferably: the covering assembly also includes a sliding member fixedly connected to the inner side of the sliding seat and slidably matched with the top frame, and a pushing rod fixedly connected to the inner side of the sliding member, the bottom array of the pushing rod is fixed with a pulley group matched with the wire rope transmission, and the bottom end of the wire rope is fixedly connected to a fixing frame, an electric telescopic rod is embedded in the top of the fixing frame, and a plug is fixedly connected to the bottom of the electric telescopic rod, and a socket matching with the plug is provided at the bottom of the fixing frame.

[0013] Preferably: the inner end of the boost tank is connected to an intercommunication valve, and a pressure sensor is embedded at the top of the intercommunication valve, and the other side of the slide seat is fixedly connected to a return spring fixedly matched with the top frame.

[0014] Preferably: two of the top frames have transverse grooves on their inner sides for sliding cooperation with the sliding member, and the second exhaust port of the booster tank is connected to the second booster pipe, and both sides of the vertical cylinder are connected to extension pipes for use with the second booster pipe.

[0015] Preferably, the outer end of the vertical cylinder close to the base frame is connected to a second pressure relief pipe with a second pressure relief valve, and the inner cavity of the vertical cylinder is provided with a stepped slide groove, in which a T-shaped slide rod fixedly matched with the top frame is slidably connected.

[0016] Preferably: a buffer spring is sleeved on the T-shaped slide bar, and the front sides of the two sets of base frames are rotatably connected to a winding roller, and one side of the winding roller is fixedly connected to a rotating wheel.

[0017] Preferably, a tarpaulin is wound around the winding roller, and a metal buckle that cooperates with the plug is embedded in an array at the head end of the tarpaulin.

[0018] Preferably: reinforcement frames are fixedly connected to both sides of the base frame, and auxiliary small wheels are rotatably connected to the inner side of the base frame.

[0019] The truck tarpaulin traction and covering device of the present invention has the following advantages:

[0020] 1. The truck tarpaulin traction covering device firstly provides a unified driving source by a double-headed motor, and the first main bevel gear drives the first slave bevel gear and the rotating rod to rotate synchronously, and the rotating rod drives the swing arms at both ends and the pistons on the two connecting rods to perform reciprocating work in the two groups of piston cylinders, and after the pressurized air source is generated in the two groups of piston cylinders, the pressurized air source in the two groups of piston cylinders is supplied to the two groups of three-way valves to complete the work supply of the pressurized air source.

[0021] 2. In the truck tarpaulin traction covering device, the pressurized air source in the two sets of three-way valves is then supplied to the two sets of booster tanks by two angle tubes for standby use, and is supplied to the top frame with a hollow cavity by two first booster pipes, telescopic pipes and straight pipes. Under the action of pressure, the two sets of telescopic air bags are forced to expand and displace, and then the two sets of slide seats are successively driven to displace in the top frame with the hollow cavity.

[0022] 3. A truck tarpaulin traction and covering device, then, two sets of slides drive the push rods on the two sets of slides to move, and drive the array-distributed pulley group to move forward. At the same time, since one end of the wire rope is in a fixed state, the forward-moving pulley group drives the wire rope to move forward, and also drives the fixed frame at the bottom of the wire rope to move forward and gradually pull up. Then, the metal buckle on the tarpaulin is clamped in advance by the electric telescopic rod, plug and socket on the fixed frame in a low position, so as to complete the pulling and covering work of the tarpaulin, and achieve a fast and effective tarpaulin covering effect for the goods in the truck bed, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a front view of the initial state of the structure of a truck tarpaulin traction and covering device of the present invention;

[0025] Figure 2 It is a rear view of the initial state of the structure of a truck tarpaulin traction and covering device of the present invention;

[0026] Figure 3 It is a rear view of the working state of the structure of a truck tarpaulin traction and covering device of the present invention;

[0027] Figure 4 It is a side cross-sectional view of the piston cylinder, supply assembly, angle tube and booster tank structure of the present invention;

[0028] Figure 5 It is a side cross-sectional view of the piston cylinder, supply assembly and angle tube structure of the present invention;

[0029] Figure 6 It is a rear view of the top frame, pulling assembly and covering assembly structure of the present invention;

[0030] Figure 7 It is a side cross-sectional view of the top frame and the pulling assembly structure of the present invention;

[0031] Figure 8 A side view of the pulling assembly and covering assembly structure of the present invention;

[0032] Fig. 9 It is a rear cross-sectional view of the vertical cylinder, top frame and booster tank structure of the present invention;

[0033] Fig.10 It is a rear cross-sectional view of the chassis and adjustment assembly structure of the present invention;

[0034] Fig.11 A side cross-sectional view of the adjustment assembly structure of the present invention;

[0035] Fig.12 It is a side view of the winding roller, rotating wheel and tarpaulin structure of the present invention.

[0036] Explanation of the marks in the figure: 1. bottom frame; 2. vertical cylinder; 3. top frame; 4. piston cylinder; 5. supply assembly; 51. double-headed motor; 52. first main bevel gear; 53. first slave bevel gear; 54. rotating rod; 55. swing arm; 56. connecting rod; 57. piston; 58. three-way valve; 6. pulling assembly; 61. angle tube; 62. booster tank; 63. first booster pipe; 64. telescopic pipe; 65. straight pipe; 66. first pressure relief pipe; 67. telescopic airbag; 68. slide seat; 7. cover assembly; 71. slide; 72. push rod; 73. pulley block; 74. wire rope; 75. fixed frame; 76. Electric telescopic rod; 77. Plug; 78. Socket; 8. Adjustment assembly; 81. Second main bevel gear; 82. Second slave bevel gear; 83. Rotating shaft; 84. Electric push rod; 85. Driving circular gear; 86. Driving large wheel; 87. Driven circular gear; 88. Driven large wheel; 9. Intercommunication valve; 10. Horizontal groove; 11. Return spring; 12. Second boost pipe; 13. Extension pipe; 14. Second pressure relief pipe; 15. T-shaped slide bar; 16. Buffer spring; 17. Winding roller; 18. Rotating wheel; 19. Tarpaulin; 20. Metal buckle; 21. Reinforcement frame; 22. Auxiliary small wheel. DETAILED DESCRIPTION

[0037] The present invention is specifically described below in conjunction with the accompanying drawings and specific embodiments:

[0038] like Figure 1-Figure 12 As shown, a truck tarpaulin traction and covering device of the present invention comprises a base frame 1, a vertical cylinder 2 is fixedly connected to the top of the base frame 1, and a top frame 3 is arranged above the vertical cylinder 2, the vertical cylinder 2 and two of the top frames 3 are provided with a hollow cavity, wherein the front sides of the two groups of base frames 1 are rotatably connected to a winding roller 17, one side of the winding roller 17 is fixedly connected to a rotating wheel 18, a tarpaulin 19 is wound on the winding roller 17, so that the tarpaulin 19 can be rolled up to prevent it from being pressed under the wheels of the truck that is poured in, and the head end array of the tarpaulin 19 is embedded with a metal buckle 20 that is plugged and matched with the plug 77, so that the tarpaulin 19 can be pulled and covered, both sides of the base frame 1 are fixedly connected to a reinforcing frame 21, and the inner side of the base frame 1 is rotatably connected to an auxiliary small wheel 22, which plays an auxiliary movement role for the four groups of base frames 1;

[0039] The inner sides of the two groups of bottom frames 1 are fixedly connected with piston cylinders 4, and the outer sides of the piston cylinders 4 are provided with supply components 5, which include a double-headed motor 51 fixed on the inner side of the vertical cylinder 2, to complete the work of supplying the pressurized air source; the inner sides of the two top frames 3 are respectively provided with pulling components 6 and covering components 7 for tarpaulin traction and covering, and the pulling component 6 includes a boosting tank 62 fixed on the back side of the piston cylinder 4, and the covering component 7 includes a steel wire rope 74 fixed on the back side of the top frame 3, so as to realize the rapid and effective tarpaulin 19 covering effect of the goods in the truck bed, saving time and effort.

[0040] like Figure 4-Figure 9 As shown, the supply assembly 5 also includes a first main bevel gear 52 fixed on an output shaft of the double-headed motor 51, and a first slave bevel gear 53 is meshed on one side of the first main bevel gear 52, and a rotating rod 54 is fixedly connected to the inner cavity of the first slave bevel gear 53. The double-headed motor 51 provides a unified driving source, and the first main bevel gear 52 drives the first slave bevel gear 53 and the rotating rod 54 to rotate synchronously, and both ends of the rotating rod 54 are fixedly connected to swing arms 55, and a connecting rod is movably connected to the swing arm 55. 56, and the other end of the connecting rod 56 is hinged with a piston 57 that slides with the piston cylinder 4, the rotating rod 54 drives the swing arms 55 at both ends and the pistons 57 on the two connecting rods 56 to reciprocate in the two groups of piston cylinders 4, the top of the piston cylinder 4 is connected to a three-way valve 58, and the top of the three-way valve 58 is connected to an air intake pipe, and after the pressurized air source is generated in the two groups of piston cylinders 4, the pressurized air source in the two groups of piston cylinders 4 is supplied to the two groups of three-way valves 58 to complete the work supply of the pressurized air source;

[0041] The pulling assembly 6 also includes an angle tube 61 connected to the exhaust port of the three-way valve 58, and the angle tube 61 is connected to the boost tank 62. The boost air source in the two sets of three-way valves 58 is supplied to the two sets of boost tanks 62 by the two angle tubes 61 for standby use. The first exhaust port of the boost tank 62 is connected to a first boost pipe 63, and the top of the first boost pipe 63 is connected to a telescopic pipe 64. The top of the telescopic pipe 64 is connected to a straight pipe 65 that is connected to and cooperates with the two top frames 3 with a hollow cavity. The boost air source is supplied by the two first boost pipes 63. , the telescopic tube 64 and the straight tube 65 are supplied into the top frame 3 with the hollow cavity, and the top end of the straight tube 65 is connected with the first pressure relief tube 66 with the first pressure relief valve, and the front end of the straight tube 65 is connected with the telescopic airbag 67 embedded in the top frame 3, and the front end of the telescopic airbag 67 is fixedly connected with the slide seat 68 that slides with the top frame 3. Under the pressure force generated by the pressurized air source, the two groups of telescopic airbags 67 are forced to expand and displace, and then successively drive the two groups of slide seats 68 to displace in the top frame 3 with the hollow cavity;

[0042] The inner end of the boost tank 62 is connected with an intercommunication valve 9, which facilitates the two groups of boost tanks 62 to be in an intercommunication state and expands the storage space of the boost gas source. A pressure sensor is embedded in the top of the intercommunication valve 9 to monitor the pressure in the two groups of boost tanks 62 in real time. The other side of the slide 68 is fixedly connected with a return spring 11 fixedly matched with the top frame 3, which plays an elastic buffering and elastic return role for the slide 68.

[0043] The covering assembly 7 also includes a sliding member 71 fixedly connected to the inner side of the sliding seat 68 and slidably matched with the top frame 3, and a pushing rod 72 is fixedly connected to the inner side of the sliding member 71, and a pulley group 73 matched with the transmission of the wire rope 74 is fixed to the bottom array of the pushing rod 72. The two groups of sliding seats 68 drive the pushing rods 72 on the two groups of sliding members 71 to move, and drive the pulley group 73 distributed in the array to move forward, and the bottom end of the wire rope 74 is fixedly connected to a fixing frame 75. Since one end of the wire rope 74 is in a fixed state, the forward-moving pulley group 73 drives the wire rope 74 to move forward, and also drives The fixing frame 75 at the bottom of the moving wire rope 74 moves forward and gradually pulls up. An electric telescopic rod 76 is embedded on the top of the fixing frame 75, and a plug 77 is fixedly connected to the bottom of the electric telescopic rod 76. A socket 78 is provided at the bottom of the fixing frame 75 to cooperate with the plug 77. The electric telescopic rod 76, the plug 77 and the socket 78 on the fixing frame 75 in the low position are pre-clamped to the metal buckle 20 on the tarpaulin 19, so that the pulling and covering work of the tarpaulin 19 can be completed, so as to achieve a fast and effective tarpaulin 19 covering effect of the goods in the truck bed, saving time and effort.

[0044] The inner sides of the two top frames 3 are provided with a transverse groove 10 that slidably cooperates with the sliding member 71, which plays a role of sliding limit for the sliding member 71, and the second exhaust port of the boost tank 62 is connected with a second boost pipe 12, so that the two-way boost air sources in the two groups of boost tanks 62 are supplied to the bottom spaces in two of the vertical cylinders 2. Both sides of the vertical cylinder 2 are connected with an extension pipe 13 used in conjunction with the second boost pipe 12, wherein the boost air sources in the bottom spaces of the two groups of vertical cylinders 2 are further supplied to the bottom spaces of the other two vertical cylinders 2 by two extension pipes 13, and the outer ends of the vertical cylinders 2 close to the bottom frame 1 are connected with a second pressure relief pipe 14 with a second pressure relief valve, and the inner cavity of the vertical cylinder 2 is provided with a stepped slide groove, and a T-shaped slide bar 15 fixedly cooperated with the top frame 3 is slidably connected in the stepped slide groove, and a buffer spring 16 is sleeved on the T-shaped slide bar 15. Under the action of pressure, the four T-shaped slide bars 15 are forced to drive the top frame 3 to lift up and meet the coverage requirements of truck cargo boxes of different heights.

[0045] like Figure 10-11 As shown, during the covering of the cargo on the truck bed, due to the different skills of the drivers, there are differences in the front and rear positions of the trucks, resulting in the phenomenon that the tarpaulin 19 is not covered in place, and there is no flexible adjustment function. It is also troublesome to frequently adjust the position of the truck. An adjustment component 8 is provided in the two sets of chassis 1, and the adjustment component 8 includes a second main bevel gear 81 fixed on the other output shaft of the double-headed motor 51, and the bottom of the second main bevel gear 81 is meshed with a second slave bevel gear 82, and the inner cavity of the second slave bevel gear 82 is fixedly connected with a rotating shaft 83 that rotates with the two sets of chassis 1. The double-headed motor 51 drives the rotating shaft 83 to rotate through the second main bevel gear 81 and the second slave bevel gear 82;

[0046] The two ends of the rotating shaft 83 are both embedded with electric push rods 84, and the piston rods of the electric push rods 84 are fixedly connected with driving circular gears 85, wherein the inner cavities of the two groups of chassis 1 are rotatably connected with driving large wheels 86, and the inner sides of the driving large wheels 86 are fixedly connected with driven circular gears 87 used in combination with the driving circular gears 85 through fixed rods, and the outer sides of the other two groups of chassis 1 are rotatably connected with driven large wheels 88 used in combination with the driving large wheels 86, and the two electric push rods 84 are controlled in advance to adjust the meshing strokes of the two groups of driving circular gears 85 and the driven circular gears 87, and the rotating shaft 83 drives the two groups of driving large wheels 86 to rotate through the two groups of driving circular gears 85 and the driven circular gears 87 that are meshed in place, and the driven large wheels 88 and the auxiliary small wheels 22 are matched to make the chassis 1, the vertical cylinder 2 and the top frame 3 flexibly adjusted front and back as a whole, without the need to frequently adjust the front and rear positions of the truck, saving time and effort, and improving the covering efficiency of the truck bed by the tarpaulin 19.

[0047] The working principle of a truck tarpaulin traction covering device is as follows: first, a plurality of metal buckles 20 on the tarpaulin 19 are placed on a plurality of groups of plugs 77, and then a plurality of electric telescopic rods 76 in a low position are controlled to drive the plugs 77 to pass through the metal buckles 20 and insert into the plug holes 78. After the head end of the tarpaulin 19 is inserted and fixed, the double-headed motor 51 is controlled to start and drive the first main bevel gear 52 to rotate, and the first main bevel gear 52 drives the rotating rod 54 on the first slave bevel gear 53 to rotate accordingly, and the rotating rod 54 drives the two groups of swing arms 55 to rotate synchronously. The two swing arms 55 drive the pistons 57 on the two connecting rods 56 to perform reciprocating work in the two piston cylinders 4, and supply the two-way pressurized air sources generated into the two three-way valves 58, and are supplied into the two booster tanks 62 by the two angle tubes 61 for temporary storage. The two booster tanks 62 are in an intercommunication state with the cooperation of the intercommunication valve 9, and the pressure sensors monitor the pressure in the two booster tanks 62 in real time until the pressure in the two booster tanks 62 reaches the maximum range value, and then the work supply is stopped, and then the two booster tanks 62 are connected according to the current height of the truck. The two-way booster gas source in the pressure tank 62 is supplied to the bottom space in the two vertical cylinders 2 through the two second booster pipes 12, and the booster gas source in the bottom space of the two vertical cylinders 2 is then supplied to the bottom space in the other two vertical cylinders 2 through the extension pipe 13. Under the pressure force generated by the booster gas source in the bottom space of the four vertical cylinders 2, the four T-shaped slide bars 15 are forced to push up in the four vertical cylinders 2, and while compressing the four buffer springs 16, the four T-shaped slide bars 15 also push up the top frame 3 to exceed the height of the truck, and then the truck is parked on the top frame 3. The tarpaulin 19 covers the area below, and waits for the tarpaulin 19 to cover the area. If the top frame 3 is too high from the truck bed, the second pressure relief valves on the four second pressure relief pipes 14 are controlled to open, and the pressurized air source in the bottom space of the four vertical cylinders 2 is discharged through the four second pressure relief pipes 14. Under the weight of the top frame 3 and the elastic reset force of the four buffer springs 16, the four T-shaped slide bars 15 are forced to drive the top frame 3 to gradually move down to a predetermined height, and then the second pressure relief valves on the four second pressure relief pipes 14 are closed to stop the top frame 3 from moving down;

[0048] Next, the two boosting gas sources in the two groups of boosting tanks 62 are sequentially passed through the telescopic tubes 64 on the two first boosting tubes 63 and the two straight-through tubes 65 to reach the top frame 3 with the hollow cavity. Under the action of the pressure, the two telescopic airbags 67 are forced to expand and move forward. The two telescopic airbags 67 that expand and move forward drive the two groups of slides 68 to move forward in the top frame 3 with the hollow cavity and compress the two return springs 11. The two groups of slides 68 drive the two groups of slide members 71 to slide forward in the transverse groove 10. The two sets of sliding members 71 drive the plurality of pulley blocks 73 arranged in an array to move forward through the push rods 72. Since one end of the plurality of steel wire ropes 74 is in a fixed state, the plurality of pulley blocks 73 arranged in an array transmit the plurality of steel wire ropes 74 forward while pulling the fixing frames 75 at the bottom of the plurality of steel wire ropes 74 upward. The plurality of fixing frames 75 drive the head end of the tarpaulin 19 fixed by the plug 77 and the socket 78 to be pulled forward along the rear end of the truck bed to cover the tarpaulin until the tarpaulin 19 pulls the tarpaulin to cover the tarpaulin. After the cover reaches the front end of the truck bed, the plurality of electric telescopic rods 76 are controlled to drive the plug 77 to reset and disengage from the socket 78. After the pulling force on the plurality of metal buckles 20 on the head end of the tarpaulin 19 is released, the first pressure relief valves on the two first pressure relief pipes 66 are controlled, and the pressurized air source in the two telescopic airbags 67 is quickly depressurized and discharged from the two first pressure relief pipes 66. The two telescopic airbags 67 that have lost the pressurized air source and expanded are quickly deflated, and the two reset springs 11 are used to pressurize the two sets of slide seats 68 and the two sets of slide members 71. Under the action of the elastic reset force, the plurality of array-distributed pulley groups 73 on the push rod 72 are forced to reset backward, and the forward pulling force on the plurality of steel wire ropes 74 is released. Under the cooperation of the weight of the plurality of fixed frames 75 and the electric telescopic rod 76, the tarpaulin 19 gradually falls and resets to the lowest initial position. After the pulling and covering measures on the tarpaulin 19 are released, the tarpaulin 19 that is pulled and covered in place falls on the truck bed under the action of its own weight, and then the staff ties the tarpaulin 19 that is covered in place to both sides of the truck bed;

[0049] When the front and rear positions of the truck bed need to be adjusted during the period when the tarpaulin 19 is covered on the truck bed, the two electric push rods 84 are first controlled to open and drive the two sets of driving circular gears 85 to move synchronously outward to the meshing part of the two sets of driven circular gears 87, and then the double-headed motor 51 is controlled to open and drive the second main bevel gear 81 to rotate. The second main bevel gear 81 drives the shaft 83 on the second driven bevel gear 82 to rotate forward or reverse synchronously. The shaft 83 drives the driven circular gear 87 to rotate forward or reverse accordingly through the driving circular gear 85 that is meshed in place. Under the cooperation of the movement of the two sets of driven large wheels 88 and the four sets of auxiliary small wheels 22, the two The two sets of driven circular gears 87 drive the two sets of driving large wheels 86 to move forward or backward accordingly, and the two sets of driving large wheels 86 serve as the rear driving force to drive the bottom frame 1, the vertical cylinder 2 and the top frame 3 to move forward or backward as a whole until the tarpaulin 19 reaches the optimal covering position for the truck bed. The double-headed motor 51 is first controlled to pause, and then the two electric push rods 84 are controlled to close and drive the two sets of driving circular gears 85 to move inward synchronously to disengage the meshing parts of the two sets of driven circular gears 87 to the initial position. Then the double-headed motor 51 is controlled to open again, and the tarpaulin 19 is driven successively to pull and cover the truck bed after it is in place.

[0050] It should be noted that the specific models and specifications of the double-headed motor 51, the electric telescopic rod 76 and the electric push rod 84 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be repeated in detail.

[0051] The power supply circuits of the double-headed motor 51, the electric telescopic rod 76, the electric push rod 84 and various valves are clear to those skilled in the art and will not be described in detail here.

[0052] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A truck tarpaulin traction and covering device, comprising a chassis (1), characterized in that: The top of the base frame (1) is fixedly connected to a vertical cylinder (2), and a top frame (3) is arranged above the vertical cylinder (2), and the vertical cylinder (2) and two of the top frames (3) are both provided with a hollow cavity; The inner sides of the two groups of base frames (1) are fixedly connected with piston cylinders (4), and the outer sides of the piston cylinders (4) are provided with supply components (5), and the supply components (5) include a double-headed motor (51) fixed on the inner side of the vertical cylinder (2); The inner sides of the two top frames (3) are respectively provided with a pulling assembly (6) and a covering assembly (7) for pulling and covering the tarpaulin, and the pulling assembly (6) includes a booster tank (62) fixed on the back of the piston cylinder (4), and the covering assembly (7) includes a steel wire rope (74) fixed on the back of the top frame (3).

2. A truck tarpaulin traction and covering device according to claim 1, characterized in that: The supply assembly (5) further comprises a first main bevel gear (52) fixed on an output shaft of the double-headed motor (51), and a first slave bevel gear (53) is meshed on one side of the first main bevel gear (52), a rotating rod (54) is fixedly connected to the inner cavity of the first slave bevel gear (53), and both ends of the rotating rod (54) are fixedly connected to swing arms (55), a connecting rod (56) is movably connected to the swing arm (55), and the other end of the connecting rod (56) is hinged with a piston (57) that is slidably matched with the piston cylinder (4), and the top of the piston cylinder (4) is connected to a three-way valve (58), and the top end of the three-way valve (58) is connected to an air intake pipe.

3. A truck tarpaulin traction and covering device according to claim 2, characterized in that: The pulling assembly (6) also includes an angle tube (61) connected to the exhaust port of the three-way valve (58), and the angle tube (61) is connected to the boost tank (62), the first exhaust port of the boost tank (62) is connected to the first boost pipe (63), and the top end of the first boost pipe (63) is connected to the telescopic tube (64), the top end of the telescopic tube (64) is connected to a straight tube (65) connected to two top frames (3) with hollow cavities, and the top end of the straight tube (65) is connected to a first pressure relief pipe (66) with a first pressure relief valve, the front end of the straight tube (65) is connected to a telescopic airbag (67) embedded in the top frame (3), and the front end of the telescopic airbag (67) is fixedly connected to a sliding seat (68) that slides with the top frame (3).

4. A truck tarpaulin traction and covering device according to claim 3, characterized in that: The covering assembly (7) also includes a sliding member (71) fixedly connected to the inner side of the sliding seat (68) and slidably matched with the top frame (3), and a pushing rod (72) fixedly connected to the inner side of the sliding member (71), a pulley group (73) fixedly connected to the bottom array of the pushing rod (72) and matched with the steel wire rope (74), and a fixed frame (75) fixedly connected to the bottom end of the steel wire rope (74), an electric telescopic rod (76) embedded in the top of the fixed frame (75), and a plug (77) fixedly connected to the bottom of the electric telescopic rod (76), and a socket (78) matched with the plug (77) is provided at the bottom of the fixed frame (75).

5. A truck tarpaulin traction and covering device according to claim 4, characterized in that: The inner end of the boost tank (62) is connected to an intercommunication valve (9), and a pressure sensor is embedded at the top of the intercommunication valve (9). The other side of the slide seat (68) is fixedly connected to a return spring (11) that is fixedly matched with the top frame (3).

6. A truck tarpaulin traction and covering device according to claim 5, characterized in that: Two of the top frames (3) are provided with transverse grooves (10) on the inner sides thereof for slidingly cooperating with the sliding member (71), and the second exhaust port of the boosting tank (62) is connected to a second boosting pipe (12), and both sides of the vertical cylinder (2) are connected to extension pipes (13) for use with the second boosting pipe (12).

7. A truck tarpaulin traction and covering device according to claim 6, characterized in that: The outer end of the vertical cylinder (2) close to the bottom frame (1) is connected to a second pressure relief pipe (14) with a second pressure relief valve, and the inner cavity of the vertical cylinder (2) is provided with a stepped slide groove, and a T-shaped slide rod (15) fixedly matched with the top frame (3) is slidably connected in the stepped slide groove.

8. A truck tarpaulin traction and covering device according to claim 7, characterized in that: The T-shaped slide bar (15) is sleeved with a buffer spring (16), and the front sides of the two groups of base frames (1) are rotatably connected to a winding roller (17), and one side of the winding roller (17) is fixedly connected to a rotating wheel (18).

9. A truck tarpaulin traction and covering device according to claim 8, characterized in that: A tarpaulin (19) is wound around the reel (17), and a metal buckle (20) that is inserted and matched with the plug (77) is embedded in the head end array of the tarpaulin (19).

10. A truck tarpaulin traction and covering device according to claim 9, characterized in that: Both sides of the base frame (1) are fixedly connected to reinforcement frames (21), and the inner side of the base frame (1) is rotatably connected to auxiliary small wheels (22).

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