Cargo fixing device for road transportation

Abstract

The invention relates to the technical field of road transportation, and one embodiment of the invention provides a cargo fixing device for road transportation, which comprises a carriage, a fixing device, a loading and unloading device and a protective device, the fixing device comprises a U-shaped frame, a hydraulic cylinder, a sliding plate, a sliding block, a connecting rod, a square plate, a first telescopic rod, a circular shaft, a second telescopic rod and a clamping plate, the U-shaped frame is fixedly installed at the bottom of the inner wall of the carriage, the hydraulic cylinder is fixedly installed at the bottom of the U-shaped frame, the sliding plate is fixedly installed at the output end of the hydraulic cylinder, and the sliding block is fixedly installed at the bottom of the sliding plate. The square plate is slidably mounted at the bottom of the inner wall of the carriage, and one end of the connecting rod is rotatably mounted at the bottom of the slider. By means of the technical scheme, the technical problem that in the prior art, when only the two sides of the goods are fixed, it is difficult to ensure that the goods move and collide in the transportation process due to bumping, acceleration, deceleration or turning of a vehicle is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of road transportation, and in particular, to a cargo securing device for road transportation. Background Art

[0002] During road transportation, the safe transportation of goods is of vital importance. Since vehicles will experience various motion states such as acceleration, deceleration, turning, and bumps during driving, if the goods are not properly fixed, they are likely to move, collide, or even fall, which will not only cause damage to the goods themselves, but may also cause traffic accidents and endanger road traffic safety.

[0003] The patent with patent announcement number CN222713392U relates to a cargo fixing structure for road transportation, including a vehicle plate, two groups of columns are arranged on both sides of the upper end of the vehicle plate, a side plate is fixed at one end of the vehicle plate, a baffle is installed between the lower parts of the columns, a flower basket is installed between the upper parts of the columns, and a fixing seat is welded on the inner wall of the baffle. The patent designs a fixing mechanism composed of a motor, a bidirectional screw, a screw block, a guide rod, a linkage rod and a locking plate. When fixing the cargo, the motor is controlled to work, and the motor drives the bidirectional screw to rotate, and then the screw block moves toward each other under the action of the thread. During the movement, the guide rod limits and guides it, and the linkage rod rotates to open the locking plate, and then the cargo is locked and fixed through the locking plate. This method replaces the original strapping fixation, which not only saves time and effort, but also has high fixing efficiency and good fixing effect.

[0004] In the above patent, the goods are locked and fixed by a locking plate, which replaces the original strapping method. It not only saves time and effort, but also has high fixing efficiency and good fixing effect. However, when only the two sides of the goods are fixed, it is difficult to ensure that the goods will not move or collide due to the vehicle's bumps, acceleration, deceleration or turning during transportation. Summary of the invention

[0005] To overcome the above-mentioned defects, an embodiment of the present invention provides a cargo securing device for road transportation, which solves the technical problem in the prior art that it is difficult to secure the cargo from movement or collision during transportation due to vehicle bumps, acceleration, deceleration or turning when only the two sides of the cargo are secured.

[0006] According to one aspect, at least one embodiment of the present invention provides a cargo securing device for road transportation, comprising a carriage, a securing device, a loading and unloading device, and a protective device; Among them, the fixing device includes a U-shaped frame, a hydraulic cylinder, a sliding plate, a slider, a connecting rod, a square plate, a first telescopic rod, a circular shaft, a second telescopic rod and a clamping plate. The U-shaped frame is fixedly installed at the bottom of the inner wall of the carriage. The hydraulic cylinder is fixedly installed at the bottom of the U-shaped frame. The sliding plate is fixedly installed at the output end of the hydraulic cylinder. The slider is fixedly installed at the bottom of the sliding plate. The square plate is slidably installed at the bottom of the inner wall of the carriage. One end of the connecting rod is rotatably installed at the bottom of the slider, and the other end of the connecting rod is rotatably connected to the top of the square plate. The first telescopic rod is fixedly installed on the inner wall of the carriage. The circular shaft slidably penetrates the square plate. The second telescopic rod is fixedly installed on the side of the square plate away from the slider. The clamping plate is slidably installed at the bottom of the inner wall of the carriage. The downward movement of the sliding plate drives the downward movement of the slider. The downward movement of the slider drives the downward movement of the connecting rod. The downward movement of the connecting rod pushes the square plate to move towards the middle. The movement of the square plate towards the middle pushes the clamping plate to move towards the middle.

[0007] For example, in a cargo fixing device for road transportation provided by at least one embodiment of the present invention, the fixing device further includes a receiving rod, a cross bar, a fixing plate, a limiting rod, a pressing rod and an L-shaped plate. The receiving rod slidably penetrates the clamping plate. The cross bar is fixedly installed on the circumferential surface of the receiving rod. The fixing plate is fixedly installed on the side of the clamping plate close to the square plate. The limiting rod is slidably installed on the side of the fixing plate close to the square plate. The pressing rod is fixedly installed on the side of the second telescopic rod away from the circular shaft. The L-shaped plate is fixedly installed on the side of the clamping plate close to the square plate. The movement of the receiving rod drives the cross bar to move towards the slider. The movement of the cross bar towards the slider releases the limitation on the limiting rod. The limiting rod moves downward by the elastic force of the third spring and is inserted into the first limiting groove to limit the clamping plate.

[0008] There is a long groove in the inner wall of the U-shaped frame. The sliding plate is slidably connected to the inner wall of the long groove. The telescopic end of the first telescopic rod is fixedly connected to the side of the clamping plate close to the square plate. The circular shaft is fixedly connected to the side of the clamping plate close to the square plate. A first spring for the reset of the square plate is arranged between the clamping plate and the square plate. A second spring for the reset of the receiving rod is arranged between the receiving rod and the clamping plate. An H-shaped groove is opened at the bottom of the inner wall of the carriage. A third spring in a compressed state is arranged between the clamping plate and the limiting rod. A first limiting groove is opened at the bottom of the inner wall of the carriage. A retaining groove is opened on the surface of the limiting rod. The side of the limiting rod close to the clamping plate is an inclined surface, which facilitates the sliding of the sliding plate and facilitates the limitation of the clamping plate.

[0009] According to another aspect, at least one embodiment of the present invention further provides a cargo fixing device for road transportation. The loading and unloading device includes an adjusting plate, a connecting shaft and a roller. The adjusting plate is slidably installed on the inner wall of the H-shaped groove. The connecting shaft is fixedly installed on the inner wall of the adjusting plate. The roller is rotatably installed on the circumferential surface of the connecting shaft. By the rotation of the roller, it is convenient for loading goods, saving manpower and improving work efficiency.

[0010] The loading and unloading device further includes a vertical rod, a first rack, a rotating shaft, a gear, and a second rack. The vertical rod is fixedly installed at the bottom of the clamping plate. The first rack is fixedly installed at the bottom of the vertical rod. The rotating shaft is fixedly installed at the bottom of the inner wall of the H-shaped groove. The gear is rotatably installed on the circumferential surface of the rotating shaft. The second rack is slidably installed on the inner wall of the H-shaped groove. An L-shaped groove is formed inside the carriage. The rotation of the gear drives the second rack to move away from the adjusting plate. When the second rack moves away from the adjusting plate, it disengages from supporting the adjusting plate. The adjusting plate loses the supporting force and moves downward. The downward movement of the adjusting plate drives the connecting shaft to move downward, and the downward movement of the connecting shaft drives the roller to move downward.

[0011] The first rack is slidably connected to the inner wall of the H-shaped groove. The first rack meshes with the gear. The second rack meshes with the gear. A first inclined surface for facilitating the extrusion of the second rack is formed on one side of the adjusting plate close to the second rack, which facilitates the sliding of the first rack and the second rack.

[0012] For example, in a cargo fixing device for road transportation provided by at least one embodiment of the present invention, the protection device includes a buffer plate, a rubber pad, a support shaft, and a hydraulic rod. The buffer plate is slidably installed on the inner wall of the carriage. The rubber pad is fixedly installed on one side of the buffer plate close to the U-shaped frame. The support shaft is fixedly installed on the inner wall of the carriage. The hydraulic rod is fixedly installed on the inner wall of the carriage. When the rubber pad is subjected to a squeezing force, it moves away from the cargo. The movement of the rubber pad drives the buffer plate to move. At the same time, the cargo is buffered by the fourth spring and the hydraulic rod.

[0013] The protection device further includes a long rod, a connecting rod, and a third telescopic rod. The long rod is fixedly installed at the top of the second rack. The connecting rod is fixedly installed at the top of the long rod. The third telescopic rod is fixedly installed on the side far from the hydraulic rod. The movement of the long rod drives the connecting rod to move. The movement of the connecting rod drives the third telescopic rod to move. The third telescopic rod moves and inserts into the second limit groove to limit the buffer plate.

[0014] The buffer plate is slidably connected to the circumferential surface of the support shaft. The rubber pad is slidably connected to the circumferential surface of the support shaft. The long rod is slidably connected to the inner wall of the L-shaped groove. The connecting rod is slidably connected to the inner wall of the L-shaped groove. A fourth spring for resetting the buffer plate is provided between the buffer plate and the carriage. A second limit groove is formed on the inner wall of the carriage. The third telescopic rod is slidably connected to one side of the buffer plate close to the hydraulic rod, which facilitates the buffering of the cargo by the buffer plate and the rubber pad and facilitates the sliding of the long rod.

[0015] The beneficial effects of the embodiments of the present invention are: In the present invention, when it is necessary to fix the goods, the hydraulic cylinder is activated to drive the sliding plate to move. At the same time, the movement of the sliding plate drives the clamping plate to move, fixing the top and both sides of the goods. Meanwhile, the clamping plate is limited by the limiting rod to prevent the goods from moving, rolling or falling due to the movement of the vehicle such as bumps, acceleration, deceleration or turning during transportation, ensuring that the goods maintain a stable position in the carriage, thus guaranteeing transportation safety. At the same time, through the cooperation of the first spring and the square plate, goods of different sizes can be fixed, improving the practicality of the carriage.

[0016] In the present invention, through the cooperation of the adjusting plate and the gear, the goods can be quickly loaded and unloaded, saving manpower and improving efficiency. At the same time, when the goods need to be fixed after being loaded, the movement of the first rack drives the gear to rotate, thereby driving the second rack to move, causing the adjusting plate to move downward, and the rollers to disengage from the contact with the goods, preventing the goods from moving or colliding during transportation, resulting in damage to the goods and the carriage.

[0017] In the present invention, through the cooperation of the hydraulic rod, the buffer plate and the rubber pad, it is possible to prevent the goods from colliding during loading, resulting in damage to the goods and the carriage. At the same time, it can effectively reduce the damage to the goods caused by collision or vibration during transportation. The buffer plate is supported by the hydraulic rod and the support shaft to prevent the buffer plate from being bent or damaged by impact, affecting its next use. The movement of the second rack drives the long rod to move, and the long rod drives the third telescopic rod to move to limit the buffer plate, preventing the goods from moving during the loading process, resulting in damage to the goods and reducing the transportation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following described drawings are only some exemplary embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the exemplary embodiments of the present invention and these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the position structure of the slider and the connecting rod of the present invention; Figure 3 It is a schematic diagram of the position structure of the square plate and the carriage of the present invention; Figure 4 For the present invention Figure 3 in which the schematic diagram of structure A; Figure 5 It is a schematic diagram of the position structure of the vertical rod and the first rack of the present invention; Figure 6Schematic diagram of the position structure of the second rack and the adjusting plate of the present invention; Figure 7 Schematic diagram of the position structure of the buffer plate and the carriage of the present invention; Figure 8 For the present invention Figure 7 Enlarged structure diagram of B in Figure 9 Schematic diagram of the position structure of the hydraulic rod and the carriage of the present invention; Figure 10 Schematic diagram of the position structure of the second rack and the long rod of the present invention; Figure 11 Schematic diagram of the position structure of the connecting rod and the third telescopic rod of the present invention.

[0020] In the figure: 1, carriage; 21, U-shaped frame; 22, hydraulic cylinder; 23, sliding plate; 24, slider; 25, connecting rod; 26, square plate; 27, first telescopic rod; 28, circular shaft; 29, second telescopic rod; 210, clamping plate; 211, receiving rod; 212, cross bar; 213, fixing plate; 214, limiting rod; 215, extrusion rod; 216, L-shaped plate; 31, vertical rod; 32, first rack; 33, rotating shaft; 34, gear; 35, second rack; 36, adjusting plate; 37, connecting shaft; 38, roller; 41, buffer plate; 42, rubber pad; 43, support shaft; 44, hydraulic rod; 45, long rod; 46, connecting rod; 47, third telescopic rod. Detailed implementation manners The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention.

[0021] For the sake of simplicity of the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, for the sake of simplicity and easy understanding of the drawings, in some figures, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0022] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0023] In the present invention, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0024] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left" and "right" are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0025] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0026] As Figures 1 to 11 shown, it shows a cargo fixing device for road transportation in an embodiment of the present invention, including a carriage 1. Among them, the fixing device includes a U-shaped frame 21, a hydraulic cylinder 22, a sliding plate 23, a slider 24, a connecting rod 25, a square plate 26, a first telescopic rod 27, a round shaft 28, a second telescopic rod 29 and a clamping plate 210. The U-shaped frame 21 is fixedly installed at the bottom of the inner wall of the carriage 1. The hydraulic cylinder 22 is fixedly installed at the bottom of the U-shaped frame 21. The sliding plate 23 is fixedly installed at the output end of the hydraulic cylinder 22. The slider 24 is fixedly installed at the bottom of the sliding plate 23. The square plate 26 is slidably installed at the bottom of the inner wall of the carriage 1. One end of the connecting rod 25 is rotatably installed at the bottom of the slider 24, and the other end of the connecting rod 25 is rotatably connected to the top of the square plate 26. The first telescopic rod 27 is fixedly installed on the inner wall of the carriage 1. The round shaft 28 slidably penetrates through the square plate 26. The second telescopic rod 29 is fixedly installed on the side of the square plate 26 away from the slider 24. The clamping plate 210 is slidably installed at the bottom of the inner wall of the carriage 1. The top and both sides of the cargo are fixed by the sliding plate 23 and the clamping plate 210, preventing the cargo from moving due to the bumping, accelerating, decelerating or turning of the vehicle during transportation, resulting in damage to the cargo.

[0027] The fixing device further includes a receiving rod 211, a cross bar 212, a fixing plate 213, a limiting rod 214, a pressing rod 215 and an L-shaped plate 216. The receiving rod 211 slidably penetrates through the clamping plate 210. The cross bar 212 is fixedly installed on the circumferential surface of the receiving rod 211. The fixing plate 213 is fixedly installed on the side of the clamping plate 210 close to the square plate 26. The limiting rod 214 is slidably installed on the side of the fixing plate 213 close to the square plate 26. The pressing rod 215 is fixedly installed on the side of the second telescopic rod 29 away from the circular shaft 28. The L-shaped plate 216 is fixedly installed on the side of the clamping plate 210 close to the square plate 26 to limit the clamping plate 210 and prevent the clamping plate 210 from moving during the transportation of goods, resulting in the movement and collision of the goods, reducing the transportation cost. At the same time, the limit on the clamping plate 210 is released by moving the cross bar 212, facilitating the unloading of goods and improving the practicability of the carriage 1.

[0028] In some examples, there is a long groove at the inner wall of the U-shaped frame 21. The sliding plate 23 is slidably connected to the inner wall of the long groove. The telescopic end of the first telescopic rod 27 is fixedly connected to the side of the clamping plate 210 close to the square plate 26. The circular shaft 28 is fixedly connected to the side of the clamping plate 210 close to the square plate 26. A first spring for the reset of the square plate 26 is arranged between the clamping plate 210 and the square plate 26. A second spring for the reset of the receiving rod 211 is arranged between the receiving rod 211 and the clamping plate 210. An H-shaped groove is opened at the bottom of the inner wall of the carriage 1. A third spring in a compressed state is arranged between the clamping plate 210 and the limiting rod 214. A first limiting groove is opened at the bottom of the inner wall of the carriage 1. A retaining groove is opened on the surface of the limiting rod 214. The side of the limiting rod 214 close to the clamping plate 210 is an inclined surface, facilitating the sliding of the sliding plate 23 and facilitating the limitation of the clamping plate 210.

[0029] For example, as Figures 1 to 11As shown, when it is necessary to fix the goods, the hydraulic cylinder 22 is activated. The activation of the hydraulic cylinder 22 drives the sliding plate 23 to move downward. The downward movement of the sliding plate 23 drives the slider 24 to move downward. The downward movement of the slider 24 drives the connecting rod 25 to move downward. The downward movement of the connecting rod 25 pushes the square plate 26 to move towards the middle. The movement of the square plate 26 towards the middle pushes the clamping plate 210 to move towards the middle, clamping and fixing the top and both sides of the goods, preventing the goods from moving, rolling or falling due to the movement of the vehicle such as bumps, acceleration, deceleration or turning during transportation, ensuring that the goods maintain a stable position in the carriage 1, thereby guaranteeing transportation safety. At the same time, the connecting rod 25 continues to move downward, driving the square plate 26 to continue to move towards the middle, enabling the clamping and fixing of goods of different sizes, improving the practicality of the carriage 1. At the same time, when the clamping plate 210 clamps the goods, the receiving rod 211 is squeezed and moves towards the direction close to the slider 24. The movement of the receiving rod 211 drives the cross bar 212 to move towards the direction close to the slider 24. The movement of the cross bar 212 towards the direction close to the slider 24 releases the limit on the limit rod 214. The limit rod 214 moves downward under the elastic force of the third spring and is inserted into the first limit groove. At the same time, through the inclined surface of the limit rod 214, the clamping plate 210 can be limited when clamping the goods, preventing the goods from moving and colliding during transportation, increasing the transportation cost. At the same time, when the goods need to be unloaded, the hydraulic cylinder 22 is activated to drive the sliding plate 23 to move upward. The upward movement of the sliding plate 23 drives the slider 24 to move upward. The upward movement of the slider 24 drives the connecting rod 25 to move upward. The upward movement of the connecting rod 25 drives the square plate 26 to move towards the direction close to the slider 24. The movement of the connecting rod 25 drives the second telescopic rod 29 to move. The movement of the second telescopic rod 29 drives the cross bar 212 to move. The cross bar 212 moves and contacts and squeezes the limit rod 214. The limit rod 214 moves upward under the extrusion force. The upward movement of the limit rod 214 releases the limit on the clamping plate 210. The clamping plate 210 moves towards the direction close to the square plate 26 under the elastic force of the first spring. At the same time, the receiving rod 211 is reset under the elastic force of the second spring. The reset of the receiving rod 211 drives the cross bar 212 to limit the limit rod 214. At the same time, the continuous movement of the square plate 26 towards the direction close to the slider 24 drives the clamping plate 210 to move, releasing the fixation of the goods, enabling the goods to be moved and taken out, improving the practicality of the carriage 1.

[0030] As Figures 1 to 11 shown, it shows that in another embodiment of the present invention, it further includes a loading and unloading device and a protection device; the loading and unloading device includes an adjusting plate 36, a connecting shaft 37 and a roller 38. The adjusting plate 36 is slidably installed on the inner wall of the H-shaped groove. The connecting shaft 37 is fixedly installed on the inner wall of the adjusting plate 36. The roller 38 is rotatably installed on the circumferential surface of the connecting shaft 37. By the rotation of the roller 38, it is convenient to load the goods, saving manpower and improving work efficiency.

[0031] The loading and unloading device further includes a vertical rod 31, a first rack 32, a rotating shaft 33, a gear 34, and a second rack 35. The vertical rod 31 is fixedly installed at the bottom of the clamping plate 210. The first rack 32 is fixedly installed at the bottom of the vertical rod 31. The rotating shaft 33 is fixedly installed at the bottom of the inner wall of the H-shaped groove. The gear 34 is rotatably installed on the circumferential surface of the rotating shaft 33. The second rack 35 is slidably installed on the inner wall of the H-shaped groove. An L-shaped groove is formed inside the carriage 1. When fixing the goods, the rotation of the gear 34 drives the movement of the second rack 35, so that the roller 38 is separated from the contact with the goods, preventing the goods from moving and colliding during transportation. In some examples, the first rack 32 is slidably connected to the inner wall of the H-shaped groove. The first rack 32 meshes with the gear 34. The second rack 35 meshes with the gear 34. A first inclined surface for facilitating the extrusion of the second rack 35 is formed on one side of the adjusting plate 36 close to the second rack 35, facilitating the sliding of the first rack 32 and the second rack 35.

[0032] The protection device includes a buffer plate 41, a rubber pad 42, a support shaft 43, and a hydraulic rod 44. The buffer plate 41 is slidably installed on the inner wall of the carriage 1. The rubber pad 42 is fixedly installed on one side of the buffer plate 41 close to the U-shaped frame 21. The support shaft 43 is fixedly installed on the inner wall of the carriage 1. The hydraulic rod 44 is fixedly installed on the inner wall of the carriage 1, buffering the goods to prevent the goods from colliding due to too fast loading speed, damaging the goods, and increasing the transportation cost.

[0033] The protection device further includes a long rod 45, a connecting rod 46, and a third telescopic rod 47. The long rod 45 is fixedly installed at the top of the second rack 35. The connecting rod 46 is fixedly installed at the top of the long rod 45. The third telescopic rod 47 is fixedly installed on the side far from the hydraulic rod 44, limiting the buffer plate 41 to prevent the goods from moving due to bumps and turning during transportation, ensuring that the goods maintain a stable position inside the carriage 1.

[0034] The buffer plate 41 is slidably connected to the circumferential surface of the support shaft 43. The rubber pad 42 is slidably connected to the circumferential surface of the support shaft 43. The long rod 45 is slidably connected to the inner wall of the L-shaped groove. The connecting rod 46 is slidably connected to the inner wall of the L-shaped groove. A fourth spring for resetting the buffer plate 41 is provided between the buffer plate 41 and the carriage 1. A second limiting groove is formed on the inner wall of the carriage 1. The third telescopic rod 47 is slidably connected to one side of the buffer plate 41 close to the hydraulic rod 44, facilitating the buffering of the goods by the buffer plate 41 and the rubber pad 42 and facilitating the sliding of the long rod 45.

[0035] For example, such as Figures 1 to 11As shown in the figure, when the goods need to be loaded into the carriage 1, the goods come into contact with the roller 38, and the rotation of the roller 38 drives the goods to move, facilitating the rapid loading of the goods into the interior of the carriage 1, saving manpower and improving work efficiency. When the goods are loaded and fixed, the clamping plate 210 moves towards the middle, driving the vertical rod 31 to move towards the middle. The vertical rod 31 moving towards the middle drives the first rack 32 to move towards the middle. The first rack 32 moving towards the middle drives the gear 34 to rotate. The rotation of the gear 34 drives the second rack 35 to move away from the adjusting plate 36. The second rack 35 moving away from the adjusting plate 36 disengages from the support of the adjusting plate 36. The adjusting plate 36 loses the supporting force and moves downward. The downward movement of the adjusting plate 36 drives the connecting shaft 37 to move downward. The downward movement of the connecting shaft 37 drives the roller 38 to move downward, causing the roller 38 to disengage from the contact with the goods, preventing the goods from moving and colliding during transportation, resulting in damage to the goods. At the same time, when unloading is required, the clamping plate 210 moves towards the direction close to the slider 24, driving the vertical rod 31 to move. The movement of the vertical rod 31 drives the first rack 32 to move in the opposite direction. The first rack 32 moving in the opposite direction drives the gear 34 to rotate in the opposite direction. The gear 35 rotating in the opposite direction drives the second rack 34 to move towards the direction close to the adjusting plate 36. The second rack 35 moving towards the direction close to the adjusting plate 36 contacts the adjusting plate 36 and squeezes the adjusting plate 36. The adjusting plate 36 moves upward under the squeezing force. The upward movement of the adjusting plate 36 drives the connecting shaft 37 to move upward. The upward movement of the connecting shaft 37 drives the roller 38 to move upward, causing the roller 38 to come into contact with the goods, facilitating the unloading of the goods through the rotation of the roller 38, saving manpower and time, and improving work efficiency.

[0036] When loading the goods and coming into contact with the rubber pad 42 and squeezing the rubber pad 42, the rubber pad 42 moves away from the goods under the squeezing force. The movement of the rubber pad 42 drives the buffer plate 41 to move. At the same time, the goods are buffered through the fourth spring and the hydraulic rod 44, preventing the goods from moving too fast during loading, resulting in collision damage to the goods and increasing the transportation cost. When fixing the goods, the second rack 35 moving away from the adjusting plate 36 drives the long rod 45 to move. The movement of the long rod 45 drives the connecting rod 46 to move. The movement of the connecting rod 46 drives the third telescopic rod 47 to move. The third telescopic rod 47 moves and inserts into the second limiting groove to limit the buffer plate 41, preventing the goods from moving during the fixing and clamping process, resulting in deviation of the fixed position of the goods, and thus causing the goods to shift and collide during transportation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A cargo fixing device for road transportation, comprising a carriage (1), characterized in that: It also includes a fixing device, a loading and unloading device, and a protection device; Among them, the fixing device includes a U-shaped frame (21), a hydraulic cylinder (22), a sliding plate (23), a slider (24), a connecting rod (25), a square plate (26), a first telescopic rod (27), a circular shaft (28), a second telescopic rod (29), and a clamping plate (210). The U-shaped frame (21) is fixedly installed at the bottom of the inner wall of the carriage (1). The hydraulic cylinder (22) is fixedly installed at the bottom of the U-shaped frame (21). The sliding plate (23) is fixedly installed at the output end of the hydraulic cylinder (22). The slider (24) is fixedly installed at the bottom of the sliding plate (23). The square plate (26) is slidably installed at the bottom of the inner wall of the carriage (1). One end of the connecting rod (25) is rotatably installed at the bottom of the slider (24), and the other end of the connecting rod (25) is rotatably connected to the top of the square plate (26). The first telescopic rod (27) is fixedly installed on the inner wall of the carriage (1). The circular shaft (28) slidably penetrates through the square plate (26). The second telescopic rod (29) is fixedly installed on the side of the square plate (26) away from the slider (24). The clamping plate (210) is slidably installed at the bottom of the inner wall of the carriage (1).

2. The cargo fixing device for road transportation according to claim 1, wherein: The fixing device further includes a receiving rod (211), a cross bar (212), a fixing plate (213), a limiting rod (214), a pressing rod (215), and an L-shaped plate (216). The receiving rod (211) slidably penetrates through the clamping plate (210). The cross bar (212) is fixedly installed on the circumferential surface of the receiving rod (211). The fixing plate (213) is fixedly installed on the side of the clamping plate (210) close to the square plate (26). The limiting rod (214) is slidably installed on the side of the fixing plate (213) close to the square plate (26). The pressing rod (215) is fixedly installed on the side of the second telescopic rod (29) away from the circular shaft (28). The L-shaped plate (216) is fixedly installed on the side of the clamping plate (210) close to the square plate (26).

3. The cargo fixing device for road transportation according to claim 2, characterized in that: A long groove is formed in the inner wall of the U-shaped frame (21), and the sliding plate (23) is slidably connected to the inner wall of the long groove. The telescopic end of the first telescopic rod (27) is fixedly connected to the side of the clamping plate (210) close to the square plate (26). The circular shaft (28) is fixedly connected to the side of the clamping plate (210) close to the square plate (26). A first spring for the reset of the square plate (26) is arranged between the clamping plate (210) and the square plate (26). A second spring for the reset of the receiving rod (211) is arranged between the receiving rod (211) and the clamping plate (210). An H-shaped groove is formed at the bottom of the inner wall of the carriage (1). A third spring in a compressed state is arranged between the clamping plate (210) and the limiting rod (214). A first limiting groove is formed at the bottom of the inner wall of the carriage (1). A retaining groove is formed on the surface of the limiting rod (214). The side of the limiting rod (214) close to the clamping plate (210) is an inclined surface.

4. The cargo fixing device for road transportation according to claim 3, characterized in that: The loading and unloading device includes an adjusting plate (36), a connecting shaft (37) and a roller (38). The adjusting plate (36) is slidably mounted on the inner wall of the H-shaped groove. The connecting shaft (37) is fixedly mounted on the inner wall of the adjusting plate (36). The roller (38) is rotatably mounted on the circumferential surface of the connecting shaft (37).

5. The cargo fixing device for road transportation according to claim 4, characterized in that: The loading and unloading device further includes a vertical rod (31), a first rack (32), a rotating shaft (33), a gear (34) and a second rack (35). The vertical rod (31) is fixedly mounted at the bottom of the clamping plate (210). The first rack (32) is fixedly mounted at the bottom of the vertical rod (31). The rotating shaft (33) is fixedly mounted at the bottom of the inner wall of the H-shaped groove. The gear (34) is rotatably mounted on the circumferential surface of the rotating shaft (33). The second rack (35) is slidably mounted on the inner wall of the H-shaped groove. An L-shaped groove is formed inside the carriage (1).

6. The cargo fixing device for road transportation according to claim 5, wherein: The first rack (32) is slidably connected to the inner wall of the H-shaped groove. The first rack (32) meshes with the gear (34). The second rack (35) meshes with the gear (34). A first inclined surface for facilitating the extrusion of the second rack (35) is formed on one side of the adjusting plate (36) close to the second rack (35).

7. A cargo fixing device for road transportation according to claim 1, characterized in that: The protection device includes a buffer plate (41), a rubber pad (42), a support shaft (43) and a hydraulic rod (44). The buffer plate (41) is slidably mounted on the inner wall of the carriage (1). The rubber pad (42) is fixedly mounted on one side of the buffer plate (41) close to the U-shaped frame (21). The support shaft (43) is fixedly mounted on the inner wall of the carriage (1). The hydraulic rod (44) is fixedly mounted on the inner wall of the carriage (1).

8. A cargo fixing device for road transportation according to claim 7, characterized in that: The protection device further includes a long rod (45), a connecting rod (46) and a third telescopic rod (47). The long rod (45) is fixedly mounted on the top of the second rack (35). The connecting rod (46) is fixedly mounted on the top of the long rod (45). The third telescopic rod (47) is fixedly mounted on the side away from the hydraulic rod (44).

9. The cargo fixing device for road transportation according to claim 8, characterized in that: The buffer plate (41) is slidably connected to the circumferential surface of the support shaft (43). The rubber pad (42) is slidably connected to the circumferential surface of the support shaft (43). The long rod (45) is slidably connected to the inner wall of the L-shaped groove. The connecting rod (46) is slidably connected to the inner wall of the L-shaped groove. A fourth spring for resetting the buffer plate (41) is arranged between the buffer plate (41) and the carriage (1).

10. The cargo fixing device for road transportation according to claim 9, characterized in that: A second limiting groove is formed on the inner wall of the carriage (1). The third telescopic rod (47) is slidably connected to one side of the buffer plate (41) close to the hydraulic rod (44).

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