Height-adjustable low flatbed semitrailer

Abstract

The utility model relates to the technical field of semitrailers, in particular to a height-adjustable low-bed semitrailer. Comprising a chassis frame, three axle assemblies are arranged below the chassis frame, two damping assemblies are arranged on each axle assembly, the damping assemblies are fixed to the bottom of the chassis frame, two transverse rods are arranged in the chassis frame, and a plurality of evenly-distributed supporting transverse rods are fixedly installed between the two transverse rods. A carriage is fixedly installed at the tops of the two transverse rods, two circular grooves are formed in the bottom of the supporting transverse rod, sliding rods are slidably installed in the circular grooves, threaded grooves are formed in the top ends of the sliding rods, lead screws are installed in the threaded grooves in a threaded mode, and first bevel gears fixedly sleeve the lead screws. Through the simple lifting structure, the single-side height of the semitrailer can be conveniently and rapidly adjusted, so that the problem that the semitrailer rolls or turns over in the heavy-load driving process can be effectively avoided, and the driving safety is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailers, in particular to a height-adjustable low-bed semi-trailer. Background Art

[0002] A semi-trailer is a trailer whose axle is placed behind the center of gravity of the vehicle (when the vehicle is evenly loaded) and is equipped with a coupling device that can transmit horizontal and vertical forces to the tractor. Semi-trailers are generally three-axle semi-trailers, and there are many types of them, such as 11-meter warehouse semi-trailers, 13-meter warehouse semi-trailers, low-bed semi-trailers, etc. It is a heavy-duty transportation vehicle connected to the semi-trailer head through a traction pin. With the continuous development of the logistics industry, a large number of semi-trailers have been put into use, which has brought great convenience to logistics and transportation work. The prior art discloses a height-adjustable low-bed semi-trailer with an authorization announcement number of CN219214968U, including a vehicle plate body, and the two ends of the left side of the bottom of the vehicle plate body are respectively vertically fixed with fixing cylinders. When the height-adjustable low-bed semi-trailer is in use, the locking nuts at both ends of the outer side of the plug rod can be unscrewed from the outer side of the plug rod according to the height of the cargo, and the plug rod can be respectively pulled out from the current reserved hole and the inside of the through groove, and the upper plate can be disassembled. Thereafter, the plug rod can be inserted into the reserved holes set at different upper and lower positions inside the corresponding fixing frame and pass through the vehicle plate body inside one side of the upper plate, and the locking nuts are respectively tightened and fixed at the two ends of the outer side of the plug rod, and the upper plate can be fixed between the fixing frames, so that the use space on the semi-trailer can be flexibly adjusted, and the problem of inconvenience in adjusting the use height of the upper layer of the semi-trailer is solved.

[0003] However, it is found in the use of the existing height-adjustable low-bed semi-trailer that it is not convenient to adjust the height of one side of the semi-trailer, which causes the semi-trailer to easily tilt or even overturn during heavy-load driving, which is not conducive to improving driving safety. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a height-adjustable low-bed semi-trailer, which is convenient for quickly adjusting the height of one side of the semi-trailer, can effectively avoid the problem of tilting or overturning of the semi-trailer during heavy-load driving, greatly improves driving safety, and solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the technical solution adopted by the utility model is as follows: a height-adjustable low-bed semi-trailer comprises a chassis frame, three axle assemblies are arranged below the chassis frame, two shock-absorbing assemblies are arranged on the axle assemblies, and the shock-absorbing assemblies are fixed to the bottom of the chassis frame, two cross bars are arranged in the chassis frame, a plurality of evenly arranged supporting cross bars are fixedly installed between the two cross bars, a carriage is fixedly installed on the top of the two cross bars, two circular grooves are provided at the bottom of the supporting cross bars, a sliding rod is slidably installed in the circular groove, a threaded groove is provided at the top of the sliding rod, a screw rod is threadedly installed in the threaded groove, a first bevel gear is fixedly sleeved on the screw rod, two motors are fixedly installed on one side of the supporting cross bar, the output shaft of the motor extends into the circular groove and is fixedly installed with a second bevel gear, the second bevel gear is meshed with the corresponding first bevel gear, the bottom end of the sliding rod extends outside the circular groove and is provided with a cross plate, and the cross plate is fixed to the inner wall of the chassis frame.

[0006] In order to facilitate quick adjustment of the height of the vehicle board:

[0007] As a further improvement of the above technical solution: the horizontal plate also includes two first hinge blocks, the first hinge blocks are fixed at the top of the corresponding horizontal plate, the same second hinge block is rotatably installed between the two first hinge blocks, the same pin rod is rotatably passed through the second hinge block and the two first hinge blocks, and the second hinge block is rotatably connected to the bottom end of the corresponding sliding rod.

[0008] The beneficial effect of this improvement is that, through such an arrangement, the height of the vehicle plate can be adjusted quickly, thereby meeting the loading and unloading requirements of different goods, which greatly facilitates the use of the semi-trailer.

[0009] To prevent the slide bar from falling out of the groove:

[0010] As a further improvement of the above technical solution: sliding grooves are provided on the inner walls on both sides of the circular groove, and sliding blocks are slidably installed in the sliding grooves, and the sliding blocks are fixed on one side of the corresponding sliding rod.

[0011] The beneficial effect of this improvement is that by providing the sliding groove and the sliding block, it is convenient to limit the sliding rod and prevent the sliding rod from falling out of the circular groove.

[0012] In order to facilitate the support and limitation of the screw rod:

[0013] As a further improvement of the above technical solution: a clamping plate is fixedly installed in the circular groove, and the screw rod rotates and penetrates the clamping plate.

[0014] The beneficial effect of this improvement is that by providing a clamping plate, it is convenient to support and limit the screw rod.

[0015] In order to facilitate the limitation of the output shaft of the motor:

[0016] As a further improvement of the above technical solution: a circular hole is penetrated on the inner wall of one side of the circular groove, and the output shaft of the motor rotates and penetrates the circular hole.

[0017] The beneficial effect of this improvement is that the output shaft of the motor can be easily limited by providing the circular hole.

[0018] In order to facilitate the limiting of the screw rod:

[0019] As a further improvement of the above technical solution: a rotation groove is opened on the top inner wall of the circular groove, and the top end of the screw rod is rotatably installed in the rotation groove.

[0020] The beneficial effect of this improvement is that by providing the rotation groove, it is convenient to limit the screw rod.

[0021] In order to facilitate the movable connection between the sliding rod and the second hinge block:

[0022] As a further improvement of the above technical solution: a through hole is penetrated on the inner wall of the bottom of the threaded groove, a round shaft is rotatably penetrated in the through hole, and the round shaft is fixed on the top of the second hinge block.

[0023] The beneficial effect of this improvement is that by setting it in this way, the sliding rod and the second hinge block can be movably connected.

[0024] The beneficial effects of the utility model are as follows: through a simple lifting structure, the height of one side of the semi-trailer can be quickly adjusted, thereby effectively avoiding the problem of the semi-trailer tipping or overturning during heavy-load driving, thereby greatly improving driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0026] Figure 2 For this utility model Figure 1 A schematic diagram of the enlarged structure of part A;

[0027] Figure 3 It is a side cross-sectional structural schematic diagram of the support cross bar in the utility model;

[0028] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the slide bar in the utility model;

[0029] Figure 5 For this utility model Figure 2 Schematic diagram of the enlarged structure of part B.

[0030] In the figure: 1, chassis frame; 2, axle assembly; 3, shock absorbing assembly; 4, cross bar; 5, supporting cross bar; 6, carriage; 7, circular groove; 8, sliding rod; 9, threaded groove; 10, screw rod; 11, first bevel gear; 12, motor; 13, second bevel gear; 14, cross plate; 15, first hinge block; 16, second hinge block; 17, pin rod; 18, through hole; 19, round shaft. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0032] like Figure 1-5As shown, a height-adjustable low-bed semi-trailer comprises a chassis frame 1, three axle assemblies 2 are arranged below the chassis frame 1, two shock-absorbing assemblies 3 are arranged on the axle assemblies 2, the shock-absorbing assemblies 3 are fixed to the bottom of the chassis frame 1, two cross bars 4 are arranged inside the chassis frame 1, a plurality of evenly arranged supporting cross bars 5 are fixedly installed between the two cross bars 4, a carriage 6 is fixedly installed on the top of the two cross bars 4, two circular grooves 7 are provided at the bottom of the supporting cross bars 5, a sliding rod 8 is slidably installed in the circular groove 7, a threaded groove 9 is provided at the top of the sliding rod 8, a screw rod 10 is threadedly installed in the threaded groove 9, a first bevel gear 11 is fixedly sleeved on the screw rod 10, and the first bevel gear 11 is fixedly sleeved on the screw rod 10. Two motors 12 are fixedly installed on one side of the crossbar 5, and the output shaft of the motor 12 extends into the circular groove 7 and is fixedly installed with a second bevel gear 13, which is meshed with the corresponding first bevel gear 11. The bottom end of the slide bar 8 extends outside the circular groove 7 and is provided with a cross plate 14, which is fixed to the inner wall of the chassis frame 1. Through a simple lifting structure, it is convenient to quickly adjust the height of one side of the semi-trailer, thereby effectively avoiding the problem of tilting or overturning of the semi-trailer during heavy-load driving, greatly improving the safety of driving. The cross plate 14 also includes two first hinge blocks 15, which are fixed to the top of the corresponding cross plate 14. The two first hinge blocks 15 are fixed to the top of the corresponding cross plate 14. The same second hinge block 16 is rotatably installed between the connecting blocks 15, and the same pin rod 17 is rotatably penetrated through the second hinge block 16 and the two first hinge blocks 15. The second hinge block 16 is rotatably connected to the bottom end of the corresponding slide bar 8. Through this arrangement, it is convenient to quickly adjust the height of the vehicle plate, so as to meet the loading and unloading requirements of different goods, which brings great convenience to the use of the semi-trailer. Slide grooves are provided on the inner walls of both sides of the circular groove 7, and a slider is slidably installed in the slide groove. The slider is fixed to one side of the corresponding slide bar 8. By setting the slide groove and the slider, it is convenient to limit the slide bar 8 to prevent the slide bar 8 from escaping from the circular groove 7. A card plate is fixedly installed in the circular groove 7. The screw rod 1 0 rotates through the card plate, and by setting the card plate, it is convenient to support and limit the screw rod 10. A round hole is penetrated on the inner wall of one side of the circular groove 7, and the output shaft of the motor 12 rotates through the round hole. By setting the round hole, it is convenient to limit the output shaft of the motor 12. A rotation groove is opened on the top inner wall of the circular groove 7. The top of the screw rod 10 is rotatably installed in the rotation groove. By setting the rotation groove, it is convenient to limit the screw rod 10. A through hole 18 is penetrated on the bottom inner wall of the threaded groove 9, and a round shaft 19 is rotatably penetrated in the through hole 18. The round shaft 19 is fixed on the top of the second hinge block 16. By setting such a setting, it is convenient to connect the sliding rod 8 with the second hinge block 16.

[0033] The working principle of the utility model is as follows: when in use, the plurality of motors 12 are first turned on, the output shaft of the second motor 12 drives the second bevel gear 13 to rotate, the second bevel gear 13 drives the corresponding first bevel gear 11 to rotate, the first bevel gear 11 drives the screw rod 10 to rotate, the screw rod 10 drives the slide bar 8 to slide out or enter the corresponding circular groove 7, so that the two cross bars 4 are driven to rise or fall on the chassis frame 1, so that the carriage 6 is lifted or lowered. By such an arrangement, it is convenient to quickly adjust the height of the vehicle plate, so as to meet the loading and unloading requirements of different goods, which brings great convenience to the use of the semi-trailer. When the vehicle plate of the semi-trailer moves toward one side during driving, the vehicle plate of the semi-trailer moves toward the other side. When the vehicle plate tilts sideways, multiple motors 12 on one side of the tilting direction of the vehicle plate are turned on at the same time, so that multiple slide bars 8 slide out of the corresponding circular grooves 7 respectively, so that the corresponding cross bar 4 is lifted to the same height as the cross bar 4 on the other side. While the slide bar 8 moves, it drives the second hinge block 16 to rotate on the corresponding two first hinge blocks 15. When the vehicle plate drives out of the inclined section, the output shafts of multiple motors 12 are reversed, so that the corresponding cross bar 4 drops, and the vehicle plate returns to normal. Through such an arrangement, it is convenient to quickly adjust the height of one side of the semi-trailer, thereby effectively avoiding the problem of tilting or overturning of the semi-trailer during heavy-load driving, greatly improving driving safety.

[0034] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0035] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A height-adjustable low-bed semi-trailer, comprising a chassis frame (1), characterized in that: Three axle assemblies (2) are provided below the chassis frame (1), two shock absorbing assemblies (3) are provided on the axle assemblies (2), the shock absorbing assemblies (3) are fixed to the bottom of the chassis frame (1), two cross bars (4) are provided inside the chassis frame (1), a plurality of evenly arranged supporting cross bars (5) are fixedly installed between the two cross bars (4), a carriage (6) is fixedly installed on the top of the two cross bars (4), two circular grooves (7) are provided at the bottom of the supporting cross bars (5), a sliding rod (8) is slidably installed in the circular groove (7), and a top of the sliding rod (8) is provided A threaded groove (9) is provided, a screw rod (10) is installed in the threaded groove (9), a first bevel gear (11) is fixedly sleeved on the screw rod (10), two motors (12) are fixedly installed on one side of the support cross bar (5), the output shaft of the motor (12) extends into the circular groove (7) and is fixedly installed with a second bevel gear (13), the second bevel gear (13) is meshed with the corresponding first bevel gear (11), the bottom end of the slide bar (8) extends out of the circular groove (7) and is provided with a cross plate (14), and the cross plate (14) is fixed on the inner wall of the chassis frame (1).

2. A height-adjustable low-bed semi-trailer according to claim 1, characterized in that: The transverse plate (14) further comprises two first hinge blocks (15), wherein the first hinge blocks (15) are fixed on the top of the corresponding transverse plate (14), and a second hinge block (16) is rotatably mounted between the two first hinge blocks (15), and a pin rod (17) is rotatably passed through the second hinge block (16) and the two first hinge blocks (15), and the second hinge block (16) is rotatably connected to the bottom end of the corresponding sliding rod (8).

3. The height-adjustable low-bed semi-trailer according to claim 1, characterized in that: Slide grooves are provided on the inner walls of both sides of the circular groove (7), and a sliding block is slidably installed in the sliding groove, and the sliding block is fixed on one side of the corresponding sliding rod (8).

4. The height-adjustable low-bed semi-trailer according to claim 1, characterized in that: A clamping plate is fixedly installed in the circular groove (7), and the screw rod (10) rotates and penetrates the clamping plate.

5. The height-adjustable low-bed semi-trailer according to claim 1, characterized in that: A circular hole is penetrated on the inner wall of one side of the circular groove (7), and the output shaft of the motor (12) rotates and penetrates the circular hole.

6. The height-adjustable low-bed semi-trailer according to claim 1, characterized in that: A rotation groove is provided on the inner wall of the top of the circular groove (7), and the top end of the screw rod (10) is rotatably mounted in the rotation groove.

7. The height-adjustable low-bed semi-trailer according to claim 2, characterized in that: A through hole (18) is passed through the inner wall of the bottom of the threaded groove (9), and a round shaft (19) is rotatably passed through the through hole (18), and the round shaft (19) is fixed on the top of the second hinge block (16).

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