Truck tarpaulin folding and unfolding device

Abstract

The utility model discloses a truck tarpaulin folding and unfolding device, and relates to the field of truck tarpaulin covering. The problems that in the prior art, goods are inconvenient to load and unload on the two sides of a boxcar, and the goods cannot be attached and wrapped are solved. Comprising a door-shaped support, an awning unfolding mechanism and an awning folding mechanism, the door-shaped support is composed of two vertical rods and a transverse rod, each vertical rod comprises a large arm and a small arm, the first end of each large arm is rotationally arranged on the outer side wall of a carriage, the first end of each small arm is rotationally connected with the second end of the corresponding large arm, and the second end of each small arm is fixedly connected with the transverse rod; the angle change rotating assembly is matched with the small arm and the large arm to rotate. The truck tarpaulin folding and unfolding device is used for automatically folding and unfolding truck tarpaulin, after the tarpaulin covers a carriage, the angle between the small arm and the large arm is increased, the height of the first end of the small arm is reduced, the height of the tarpaulin is driven to be reduced, and the tarpaulin is better attached to and wraps goods; after the tarpaulin is folded, the angle between the large arm and the small arm is reduced, the second end of the large arm is lowered, and the large arm is lower than the upper end of the carriage, so that goods are loaded and unloaded from two sides of the carriage.

Description

Technical Field

[0001] The utility model relates to the field of truck tarpaulin covering, in particular to a truck tarpaulin retracting and releasing device. Background Art

[0002] With the development of modern society, environmental pollution has become more and more serious, so the current society is constantly increasing its efforts to protect the environment. The truck transportation industry has put forward higher requirements for the covering of discrete goods, especially slag, stones, etc., transported by trucks. Compared with the covering method of manually covering with tarpaulins, automatic covering devices have appeared in this field, and automatic tarpaulin retracting and releasing devices are widely used in the transportation of slag and stones. For example, the publication number is CN111204275A, and the name is a covering system for truck compartments. It discloses an automatic covering device for truck tarpaulins, including a tarpaulin, a door-shaped bracket, a tarpaulin retracting mechanism and a tarpaulin releasing mechanism. Under the cooperation of the tarpaulin retracting mechanism and the tarpaulin releasing mechanism, the door-shaped bracket drives the tarpaulin to fold and cover the truck compartment, so that the automatic covering of the truck tarpaulin can be easily realized. The covering system of the truck compartment has the following disadvantages: the upper arm and the lower arm of the vertical rod of the gate-shaped bracket of the covering system of the truck compartment are an integrated structure, and the covering system of the truck compartment is used for automatically folding and covering the truck compartment tarpaulin. After the tarpaulin is folded, the upper arm is higher than the truck compartment, causing obstruction when loading and unloading goods from both sides of the compartment, making it inconvenient for the truck compartment to load and unload goods from both sides, especially for short truck compartments. Moreover, after the tarpaulin covers the compartment, it cannot fit and cover the goods, and there is a safety hazard of the goods falling off. Utility Model Content

[0003] The utility model provides a truck tarpaulin folding and unfolding device, which aims to solve the problems that the truck compartment covering system is used for a short truck compartment, inconvenience in loading and unloading goods from both sides after the tarpaulin is folded, and the tarpaulin cannot fit and wrap the goods after covering the compartment, posing a potential safety hazard.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model discloses a truck tarpaulin folding and unfolding device, comprising a door-shaped bracket, a tarpaulin unfolding mechanism and a tarpaulin folding mechanism, wherein the tarpaulin is folded or covered on the top of the truck compartment through the door-shaped bracket in cooperation with the tarpaulin folding mechanism and the tarpaulin unfolding mechanism, and is characterized in that the door-shaped bracket is composed of two oppositely arranged vertical rods and a cross rod connecting the two vertical rods, the vertical rod comprising a large arm and a small arm, the first end of the large arm being rotatably arranged on the outer side wall of the compartment, the first end of the small arm being rotatably connected to the second end of the large arm, the second end of the small arm being fixedly connected to the cross rod, and further comprising an angle-changing rotating component that cooperates with the rotation of the small arm and the large arm.

[0006] Furthermore, the angle-changing rotation assembly includes a first steel wire rope and a tensile elastic element, one end of the first steel wire rope is connected to the first end of the small arm, the other end of the first steel wire rope is arranged on the side wall of the truck compartment, the tensile elastic element is connected between the second end close to the upper arm and the first end of the small arm, the first steel wire rope is arranged outside the angle between the upper arm and the small arm, and the tensile elastic element is arranged inside the angle between the upper arm and the small arm.

[0007] Furthermore, the stretching elastic element is a stretching spring, and the first end of the small arm and the second end of the large arm are both provided with spring hanging rings, and the stretching spring is hung on the corresponding spring hanging rings.

[0008] Furthermore, a wire rope guide ring is provided on the outer side of the upper arm along its length direction, and the first wire rope passes through the corresponding wire rope guide ring and is connected to the lower arm.

[0009] Furthermore, the angle-changing rotation assembly includes a second steel wire rope and a compression elastic element, one end of the second steel wire rope is connected to the second end of the small arm close to it, the other end of the second steel wire rope is arranged on the side wall of the truck compartment, the compression elastic element is connected between the second end close to the upper arm and the first end of the small arm, and the second steel wire rope and the compression elastic element are arranged on the inner side of the angle between the upper arm and the small arm.

[0010] Furthermore, the compression elastic element is a compression spring, and the first end of the small arm and the second end of the large arm are both provided with spring hanging rings, and the compression spring is hung on the corresponding spring hanging rings.

[0011] Furthermore, a wire rope guide ring is provided on the inner side of the upper arm along its length direction, and the second wire rope passes through the corresponding wire rope guide ring and is connected to the lower arm.

[0012] Furthermore, the angle changing rotation assembly includes a telescopic rod, one end of which is rotatably set on the side wall of the truck compartment, the other end of the telescopic rod is rotatably connected to the first end of the small arm, and one end of the telescopic rod rotatably set on the side wall of the truck compartment is set between the truck head and the large arm.

[0013] Furthermore, the forearm is L-shaped, the L-shaped forearm and the upper arm form a Z-shaped vertical rod, the long side of the L-shaped forearm is rotatably connected to the second end of the upper arm, and the short side of the L-shaped forearm is fixedly connected to the cross bar.

[0014] Furthermore, a truck tarpaulin retracting and releasing device of the present application also includes a pulley and a pull rope, wherein the two pulleys are relatively arranged on the two side walls of the truck compartment near the front of the vehicle, one end of the pull rope is connected to the front end of the tarpaulin, and the other end of the pull rope is passed around the pulley and arranged on the upper arm.

[0015] The beneficial effects of the utility model are:

[0016] The present invention discloses a truck tarpaulin retracting and unfolding device, which is used for automatically retracting and unfolding a truck tarpaulin. The vertical rod of the gate-shaped bracket is composed of a large arm and a small arm that are rotatably arranged. During the process of putting up and putting down the tarpaulin, the large arm and the small arm change their rotation angles in cooperation with the angle-changing rotating assembly. During the process of putting up and covering the tarpaulin, the angle-changing rotating assembly works, and the first end of the small arm and the second end of the large arm rotate at an angle. After the tarpaulin covers the vehicle compartment, the angle between the small arm and the large arm increases, and the height of the first end of the small arm decreases, driving the height of the tarpaulin to decrease. The crossbar connected to the small arm is pressed against the vehicle compartment, so that the tarpaulin is close to the cargo, and the tarpaulin is pressed against the vehicle compartment. It can better fit and cover the cargo in the carriage to prevent the cargo from falling off, and improve the safety of the truck tarpaulin retracting and unloading device; during the process of retracting and opening the tarpaulin, the angle changing rotating component works, and the second end of the upper arm and the first end of the lower arm rotate. After the tarpaulin is folded, the angle between the upper arm and the lower arm becomes smaller, and the height of the second end of the upper arm is reduced, so that the upper arm is lower than the upper end of the carriage. In this way, when loading and unloading cargo from both sides of the truck carriage, the upper arm will not block the cargo or loading and unloading equipment, which is convenient for loading and unloading cargo from both sides of the carriage. It is particularly suitable for loading and unloading cargo on both sides of the carriage of low trucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a tarpaulin covering a compartment of a truck tarpaulin retracting and releasing device provided by an embodiment of the utility model, wherein the angle-changing rotating components in the figure are a first steel wire rope and a tension spring;

[0019] Figure 2 It is a schematic diagram of a tarpaulin retracting and unfolding device for a truck provided by an embodiment of the utility model after the tarpaulin is folded, and the angle-changing rotating components in the figure are a first steel wire rope and a tension spring;

[0020] Figure 3It is a schematic diagram of a tarpaulin covering a compartment of a truck tarpaulin retracting and releasing device provided by an embodiment of the utility model, wherein the angle-changing rotating components in the figure are a second steel wire rope and a compression spring;

[0021] Figure 4 It is a schematic diagram of a truck tarpaulin retracting and unfolding device provided by an embodiment of the utility model after the tarpaulin is retracted, and the angle-changing rotating components in the figure are a second steel wire rope and a compression spring;

[0022] Figure 5 It is a schematic diagram of a tarpaulin covering a compartment of a truck tarpaulin retracting and releasing device provided by an embodiment of the utility model, and the angle-changing rotating component in the figure is a telescopic pull rod;

[0023] Figure 6 It is a schematic diagram of a truck tarpaulin retracting and unfolding device provided by an embodiment of the utility model after the tarpaulin is folded, and the angle-changing rotating component in the figure is a telescopic pull rod;

[0024] Figure 7 It is a schematic diagram of a door-shaped bracket provided in an embodiment of the utility model.

[0025] Figure numerals: door-shaped bracket 1, vertical rod 101, horizontal rod 102, tarpaulin 2, wire rope guide ring 3, upper arm 4, wire rope 5, spring hanging ring 6, lower arm 7, tension spring 8, tension spring 9, carriage 10, pull rope 11, pulley 12, telescopic steel pipe 13, motor 14, compression spring 15, second wire rope 16. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, this embodiment provides a truck tarpaulin folding and unfolding device, including a door-shaped bracket 1, a tarpaulin unfolding mechanism and a tarpaulin folding mechanism, the tarpaulin 2 is folded or covered on the top of the truck compartment 10 by the door-shaped bracket 1 under the cooperation of the tarpaulin folding mechanism and the tarpaulin unfolding mechanism, the door-shaped bracket 1 is composed of two vertical rods 101 arranged on the left and right side walls of the truck compartment 10 and a cross bar 102 connecting the two vertical rods 101, the vertical rod 101 includes a large arm 4 and a small arm 7, the first end of the large arm 4 is rotatably arranged on the outer side wall of the compartment 10, the first end of the small arm 7 is rotatably connected to the second end of the large arm 4, the second end of the small arm 7 is fixedly connected to the cross bar 102, and also includes an angle change rotating component that cooperates with the rotation of the small arm 7 and the large arm 4. The first end of the small arm 7 and the second end of the large arm 4 can be connected by hinged rotation.

[0029] The truck tarpaulin retracting and unfolding device based on the above structure is used for automatically retracting and unfolding the truck tarpaulin 2. The vertical rod 101 of the gate-shaped bracket 1 is composed of a large arm 4 and a small arm 7 that are rotatably arranged. During the process of putting up and putting down the tarpaulin 2, the large arm 4 and the small arm 7 change their rotation angles in cooperation with the angle-changing rotating assembly. The tarpaulin 2 covers the carriage 10 under the drive of the tarpaulin-putting mechanism. When the angle-changing rotating assembly works, the first end of the small arm 7 and the second end of the large arm 4 rotate at an angle. After the tarpaulin 2 covers the carriage 10, the angle between the small arm 7 and the large arm 4 increases, and the height of the first end of the small arm 7 decreases, driving the height of the tarpaulin 2 to decrease. The crossbar 102 connected to the small arm is pressed on the carriage 10 to tighten the tarpaulin 2. The tarpaulin 2 fits and covers the cargo in the carriage 10 better to prevent the cargo from falling off, thereby improving the safety of the tarpaulin retracting and releasing device of the truck; the tarpaulin 2 is folded under the drive of the tarpaulin retracting mechanism, and the angle-changing rotating component works. After the tarpaulin 2 is folded, the second end of the upper arm 4 and the first end of the lower arm 7 rotate, the angle between the upper arm 4 and the lower arm 7 becomes smaller, and the height of the second end of the upper arm 4 is reduced, so that the upper arm 4 is lower than the upper end of the carriage 10. When loading and unloading cargo from both sides of the truck carriage 10, the upper arm 4 will not cause obstruction to the cargo or loading and unloading equipment, which is convenient for loading and unloading cargo from both sides of the carriage 10, and is particularly suitable for loading and unloading cargo on both sides of a low truck carriage.

[0030] As an implementation method, Figure 1 , Figure 2As shown, the angle-changing rotating assembly includes a first steel wire rope 5 and a stretching elastic element, one end of the first steel wire rope 5 is connected to the first end of the small arm 7, the other end of the first steel wire rope 5 is arranged on the side wall of the truck compartment 10, the stretching elastic element is connected between the second end close to the upper arm 4 and the first end of the small arm 7, the first steel wire rope 5 is arranged outside the angle between the upper arm 4 and the small arm 7, and the stretching elastic element is arranged inside the angle between the upper arm 4 and the small arm 7. Wherein, the stretching elastic element is a stretching rubber band or a stretching spring 8. Further, the stretching elastic element is a stretching spring 8.

[0031] Driven by the tarpaulin releasing mechanism, the tarpaulin 2 covers the carriage 10, and the upper arm 4 rotates from the front end of the carriage 10 to the rear end of the carriage 10, the first steel wire rope 5 is gradually tightened, and the rotation angle of the first end of the forearm 7 and the second end of the upper arm 4 changes. After the tarpaulin 2 covers the carriage 10, the angle between the forearm 7 and the upper arm 4 becomes larger, and the height of the first end of the forearm 7 is reduced, driving the height of the tarpaulin 2 to be reduced, and the tension spring 8 connected between the first end of the forearm 7 and the second end of the upper arm 4 is stretched and extended to store power and energy. The elastic force of the tension spring 8 on the second end of the forearm 7 and the resistance of the carriage to the second end of the forearm 7 form an action force and a reaction force, so that the cross bar 102 connected to the forearm 7 is pressed against the carriage 10, and the tarpaulin 2 is close to the cargo, and the tarpaulin 2 better fits and covers the cargo in the carriage 10 to prevent the cargo from falling off, thereby improving the safety of the truck tarpaulin retracting and releasing device. The tarpaulin 2 is folded under the drive of the folding mechanism, the arm 4 rotates from the rear end of the carriage 10 to the front end of the carriage 10, and the tension spring 8 releases its elastic force and contracts. After the tarpaulin 2 is folded, the tension spring 8 pulls the small arm 7 and the arm 4 closer, the angle between the arm 4 and the small arm 7 becomes smaller, and the height of the second end of the arm 4 is reduced, so that the arm 4 is lower than the upper end of the carriage 10, which is convenient for loading and unloading goods from both sides of the truck carriage 10. The first steel wire rope 5 and the tension spring 8 are arranged in reverse relative to the arm 4. The angle between the arm 4 and the small arm 7 is the smaller angle between the arm 4 and the small arm 7.

[0032] In order to facilitate the hanging and installation of the tension spring 8, the first end of the small arm 7 and the second end of the large arm 4 are both provided with a spring hanging ring 6, and the two ends of the tension spring 8 are respectively hung and fixed on the corresponding spring hanging ring 6. For example, a relative spring hanging ring 6 is provided inside the angle between the first end of the small arm 7 and the second end of the large arm 4. Further, the small arm 7 is provided with a wire rope hanging ring for hanging and installing the first wire rope 5.

[0033] In order to prevent the first steel wire rope 5 from being entangled or hooked with surrounding parts and affecting the normal operation of the truck tarpaulin retracting and releasing device, at least one steel wire rope guide ring 3 is provided on the outer side of the upper arm 4 along its length direction, and the first steel wire rope 5 passes through the corresponding steel wire rope guide ring 3 and is connected to the lower arm 7, and the steel wire rope guide ring 3 guides and limits the steel wire rope 5. The outer side of the upper arm 4 is the outer side of the angle between the upper arm 4 and the lower arm 7.

[0034] As an implementation method, Figure 3 , Figure 4 As shown, the angle-changing rotating assembly includes a second steel wire rope 16 and a compression elastic element, one end of the second steel wire rope 16 is connected to the second end of the small arm 7 close to it, the other end of the second steel wire rope 16 is arranged on the side wall of the truck compartment 10, the compression elastic element is connected between the second end close to the upper arm 4 and the first end of the small arm 7, and the second steel wire rope 16 and the compression elastic element are arranged inside the angle between the upper arm 4 and the small arm 7. The compression elastic element is a rubber elastic product or a compression spring 15. Further, the compression elastic element is a compression spring 15.

[0035] The tarpaulin 2 is folded under the drive of the folding mechanism, and the boom 4 rotates from the rear end of the carriage 10 to the front end of the carriage 10, the second steel wire rope 16 is gradually tightened, and the rotation angle of the first end of the forearm 7 and the second end of the boom 4 changes. After the tarpaulin 2 is folded, the second steel wire rope 16 pulls the forearm 7 and the boom 4 closer, the angle between the boom 4 and the forearm 7 becomes smaller, the height of the second end of the boom 4 is reduced, the compression spring 15 is compressed to store power and energy, and the boom 4 is lower than the upper end of the carriage 10, which is convenient for loading and unloading goods from both sides of the truck carriage 10. Driven by the tarpaulin lowering mechanism, the tarpaulin 2 covers the carriage 10, and the upper arm 4 rotates from the front end of the carriage 10 to the rear end of the carriage 10, and the compression spring 15 releases its elastic force and stretches, and the rotation angles of the first end of the forearm 7 and the second end of the upper arm 4 change. After the tarpaulin 2 covers the carriage 10, the angle between the forearm 7 and the upper arm 4 becomes larger, and the height of the first end of the forearm 7 decreases, driving the height of the tarpaulin 2 to decrease, so that the cross bar 102 connected to the forearm 7 is pressed against the carriage 10, and the tarpaulin 2 is close to the cargo. The tarpaulin 2 better fits and covers the cargo in the carriage 10 to prevent the cargo from falling off, thereby improving the safety of the truck tarpaulin retracting and releasing device.

[0036] In order to facilitate hanging, installing and fixing the compression spring 15, the first end of the small arm 7 and the second end of the large arm 4 are both provided with a spring hanging ring 6, and the two ends of the compression spring 15 are respectively hung and fixed on the corresponding spring hanging ring 6.

[0037] In order to prevent the second steel wire rope 16 from being entangled with or hooked on surrounding parts and affecting the normal operation of the truck tarpaulin retracting and releasing device, at least one steel wire rope guide ring 3 is provided on the inner side of the upper arm 4 along its length direction, and the first steel wire rope 5 and the second steel wire rope 16 pass through the corresponding steel wire rope guide ring 3 and are connected to the lower arm 7.

[0038] Preferably, multiple, such as two, three or more, wire rope guide rings 3 are evenly arranged along the length direction of the boom 4, one end of the first wire rope 5 or the second wire rope 16 passes through the wire rope guide ring 3 in turn and is connected to the arm 7, the other end of the first wire rope 5 or the second wire rope 16 is hinged on the side wall of the truck compartment 10, and the wire rope guide ring 3 guides and limits the wire rope 5 to prevent the first wire rope 5 or the second wire rope 16 from being entangled or hooked with surrounding parts to affect the normal operation of the truck tarpaulin retracting and releasing device. Among them, the inner side of the boom 4 is the inner side of the angle between the boom 4 and the arm 7.

[0039] As an implementation method, Figure 5 , Figure 6 As shown, the angle changing rotating assembly includes a telescopic rod 13, one end of which is rotatably set on the side wall of the truck compartment 10, the other end of the telescopic rod 13 is rotatably connected to the first end of the small arm 7, and one end of the telescopic rod 13 rotatably set on the side wall of the truck compartment 10 is set between the truck head and the large arm 4.

[0040] The tarpaulin 2 covers the carriage 10 under the drive of the tarpaulin releasing mechanism, the arm 4 rotates from the front end of the carriage 10 to the rear end of the carriage 10, the telescopic pull rod 13 extends, the rotation angle of the first end of the arm 7 and the second end of the arm 4 changes, after the tarpaulin 2 covers the carriage 10, the angle between the arm 7 and the arm 4 increases, the height of the first end of the arm 7 decreases, driving the height of the tarpaulin 2 to decrease, the telescopic pull rod 13 presses on the first end of the arm 7, so that the cross bar 102 connected to the arm 7 is pressed on the carriage 10, the tarpaulin 2 is close to the goods, the tarpaulin 2 better fits and covers the goods in the carriage 10, prevents the goods from falling off, and improves the safety of the truck tarpaulin retracting and releasing device. The tarpaulin 2 is folded under the drive of the tarpaulin collecting mechanism, the arm 4 rotates from the rear end of the carriage 10 to the front end of the carriage 10, the telescopic pull rod 13 shrinks, the angle between the arm 4 and the arm 7 decreases, the height of the second end of the arm 4 decreases, so that the arm 4 is lower than the upper end of the carriage 10, which is convenient for loading and unloading goods from both sides of the truck carriage 10. The telescopic pull rod 13 is such as a telescopic steel pipe.

[0041] As an implementation method, Figure 7As shown, the shape of the small arm 7 is L-shaped, and the L-shaped small arm 7 and the straight upper arm 4 form a Z-shaped vertical rod 101. The long side of the L-shaped small arm 7 is rotatably connected to the second end of the straight upper arm 4, and the short side of the L-shaped small arm 7 is fixedly connected to the cross bar 102.

[0042] Two straight arms 4 and two L-shaped arms 7 form two vertical rods 101, which are relatively rotatably arranged on the left and right side walls of the truck compartment 10. The two vertical rods 101 and a cross bar 102 are connected to form a door-shaped bracket 1, which is used in conjunction with the compartment 10. The short side of the arm 7 is fixedly connected to the cross bar 102 by bolts or welding.

[0043] As an implementation method, Figure 7 As shown, the first end of the small arm 7 is pivotally connected to the second end of the large arm 4 .

[0044] A pin seat is welded to the first end of the small arm 7, and pin holes are set on the pin seat and the second end of the big arm 4. The second end of the big arm 4 is put into the pin seat, and the pin shaft passes through the pin hole in sequence to make the first end of the small arm 7 rotatably connected with the second end of the big arm 4.

[0045] The truck tarpaulin retracting and releasing device also includes a pulley 12 and a pull rope 11. The two pulleys 12 are relatively arranged on the left and right side walls of the truck compartment 10 near the front of the vehicle. One end of the pull rope 11 is connected to the front end of the tarpaulin 2, and the other end of the pull rope 11 is passed around the pulley 12 and arranged on the upper arm 4.

[0046] The pull rope 11 is respectively fixedly connected to the two sides of the front end of the tarpaulin 2, such as being passed through the tarpaulin 2 and tied to it. After the tarpaulin 2 covers the car body 10, the two sides of the tarpaulin 2 are tightened and covered, so that the tarpaulin 2 is further covered on the car body 10 and fits and wraps the cargo, preventing the cargo from falling off from the two sides of the car body 10. The pull rope 11 is an elastic pull rope, such as a rubber band, which adapts to the stroke of the upper arm 4.

[0047] The surface wall of the upper arm 4 is provided with a pin, and the connecting end of the pull rope 11 and the upper arm 4 is provided with a hanging ring matched with the pin.

[0048] The pull rope 11 is hinged on the big arm 4 through a pin and a hanging ring. Further, the steel wire rope 5 is hinged on the side wall of the freight car 10 through a pin and a hanging ring.

[0049] The awning mechanism includes a tension spring 9, one end of which is hinged on the side wall of the truck compartment 10 near the rear position, and the other end of the tension spring 9 is hinged on the arm 4 near its first end position. The awning cloth 2 is folded under the drive of the awning folding mechanism, and the arm 4 rotates from the rear end of the compartment 10 to the front end of the compartment 10. The tension spring 9 is extended to store energy. When the awning is folded, the tension spring 9 releases the stored elastic force, driving the arm 4 to rotate from the front end of the compartment 10 to the rear end of the compartment 10, and the awning cloth 2 covers the compartment 10. The awning folding device is arranged on the front side wall of the compartment, and includes a motor 14, a reducer, a power transmission device, a winch, a awning folding rope, a controller, a satellite navigation component, etc. The output end of the motor is connected to the input end of the reducer, and the output end of the reducer is connected to the input end of the power transmission device. The power transmission device winds the awning folding rope around the winch, and the awning folding rope is connected to the folded end of the awning cloth 2. The controller is electrically connected to the satellite navigation component. The operator sends a awning folding command to the controller through the remote controller, and the controller instructs the motor to rotate, and the motor 14 drives the reducer to rotate, and the reducer makes the awning folding rope wind around the winch of the power transmission device, and the awning folding rope pulls the awning cloth 2 to achieve awning folding.

[0050] The above description is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention.

Claims

1. A truck tarpaulin folding and unfolding device, comprising a door-shaped bracket (1), a tarpaulin unfolding mechanism and a tarpaulin folding mechanism, wherein the tarpaulin (2) is folded or covered on the top of a truck compartment (10) through the door-shaped bracket (1) in cooperation with the tarpaulin folding mechanism and the tarpaulin unfolding mechanism, wherein: The door-shaped bracket (1) is composed of two vertical rods (101) arranged opposite to each other and a cross rod (102) connecting the two vertical rods (101); the vertical rod (101) includes a large arm (4) and a small arm (7); the first end of the large arm (4) is rotatably arranged on the outer side wall of the carriage (10); the first end of the small arm (7) is rotatably connected to the second end of the large arm (4); the second end of the small arm (7) is fixedly connected to the cross rod (102); and the bracket also includes an angle-changing rotation component for cooperating with the rotation of the small arm (7) and the large arm (4).

2. A truck tarpaulin retracting and unfolding device according to claim 1, characterized in that: The angle-changing rotating assembly comprises a first steel wire rope (5) and a tensile elastic element, wherein one end of the first steel wire rope (5) is connected to the first end of the small arm (7), and the other end of the first steel wire rope (5) is arranged on the side wall of the truck compartment (10). The tensile elastic element is connected between the second end close to the upper arm (4) and the first end of the small arm (7). The first steel wire rope (5) is arranged outside the angle between the upper arm (4) and the small arm (7), and the tensile elastic element is arranged inside the angle between the upper arm (4) and the small arm (7).

3. A truck tarpaulin retracting and unfolding device according to claim 2, characterized in that: The stretching elastic element is a stretching spring (8), the first end of the small arm (7) and the second end of the large arm (4) are both provided with a spring hanging ring (6), and the stretching spring (8) is hung on the corresponding spring hanging ring (6).

4. A truck tarpaulin retracting and unfolding device according to claim 2, characterized in that: A wire rope guide ring (3) is provided on the outer side of the upper arm (4) along its length direction, and the first wire rope (5) passes through the corresponding wire rope guide ring (3) and is connected to the lower arm (7).

5. The truck tarpaulin retracting and unfolding device according to claim 1 is characterized in that: The angle-changing rotating assembly comprises a second steel wire rope (16) and a compression elastic element, wherein one end of the second steel wire rope (16) is connected to the second end of the small arm (7) close thereto, and the other end of the second steel wire rope (16) is arranged on the side wall of the truck compartment (10), and the compression elastic element is connected between the second end close to the upper arm (4) and the first end of the small arm (7), and the second steel wire rope (16) and the compression elastic element are arranged on the inner side of the angle between the upper arm (4) and the small arm (7).

6. A truck tarpaulin retracting and unfolding device according to claim 5, characterized in that: The compression elastic element is a compression spring (15), and the first end of the small arm (7) and the second end of the large arm (4) are both provided with a spring hanging ring (6), and the compression spring (15) is hung on the corresponding spring hanging ring (6).

7. A truck tarpaulin retracting and unfolding device according to claim 5, characterized in that: A wire rope guide ring (3) is provided on the inner side of the upper arm (4) along its length direction, and the second wire rope (16) passes through the corresponding wire rope guide ring (3) and is connected to the lower arm (7).

8. The truck tarpaulin retracting and unfolding device according to claim 1, characterized in that: The angle-changing rotating assembly comprises a telescopic rod (13), one end of which is rotatably arranged on the side wall of the truck compartment (10), the other end of which is rotatably connected to the first end of the small arm (7), and one end of which is rotatably arranged on the side wall of the truck compartment (10) is arranged between the truck head and the large arm (4).

9. The truck tarpaulin retracting and unfolding device according to claim 1, characterized in that: The shape of the small arm (7) is L-shaped, and the L-shaped small arm (7) and the upper arm (4) form a Z-shaped vertical rod (101), the long side of the L-shaped small arm (7) is rotatably connected to the second end of the upper arm (4), and the short side of the L-shaped small arm (7) is fixedly connected to the cross bar (102).

10. A truck tarpaulin retracting and unfolding device according to any one of claims 1 to 9, characterized in that: It also includes a pulley (12) and a pull rope (11), wherein the two pulleys (12) are relatively arranged on the two side walls of the truck compartment (10) near the front of the truck, one end of the pull rope (11) is connected to the front end of the tarpaulin (2), and the other end of the pull rope (11) is passed around the pulley (12) and arranged on the upper arm (4).

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