Length-adjustable flat-bed trailer

Abstract

The utility model provides a flat-bed trailer with the adjustable length, and belongs to the technical field of flat-bed trailers. The foldable trailer comprises a chassis and a trailer body arranged on the chassis, the trailer body comprises a front trailer body and a rear trailer body, the front trailer body and the rear trailer body are in sliding fit with the chassis, a trailer body fastening structure is further arranged on the chassis, and a foldable trailer body extension structure is further arranged on the inner side of the front trailer body and the inner side of the rear trailer body. The front vehicle body and the rear vehicle body can slide back and forth on the chassis so as to adjust the overall length of the trailer body, and after adjustment is completed, the positions of the front vehicle body and the rear vehicle body are fixed through the vehicle body fastening structure; according to the folding vehicle body extension structure, an extension plate can extend from the front vehicle body and the rear vehicle body to cover the chassis.

Description

Technical Field

[0001] The utility model belongs to the technical field of flatbed trailer bodies and relates to a length-adjustable flatbed trailer. Background Art

[0002] In the prior art, the body length of a flatbed trailer is fixed. The length of a flatbed trailer has its own advantages and disadvantages, so it is necessary to design a flatbed trailer with adjustable length.

[0003] For example, a Chinese patent discloses a transversely retractable low-bed semi-trailer [application number: 202410563234.0], which includes a body assembly, with a traction rotating body and a ladder assembly respectively provided at both ends of the body assembly. The traction rotating body is hinged to a rotating hinge at one end close to the body assembly, and a second hydraulic cylinder is hinged to one end inside the traction rotating body. Gooseneck opening and closing beams are respectively hinged on both sides of the traction rotating body, and the gooseneck opening and closing beams are hinged to an opening and closing connecting arm. Utility Model Content

[0004] The purpose of this utility model is to provide a length-adjustable flatbed trailer in view of the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A length-adjustable flatbed trailer comprises a chassis and a trailer body arranged on the chassis, wherein the trailer body comprises a front body and a rear body, the front body and the rear body being in sliding cooperation with the chassis, the chassis being further provided with a body fastening structure, and the inner sides of the front body and the rear body being further provided with a foldable body extension structure.

[0007] In the above-mentioned length-adjustable flatbed trailer, the foldable body extension structure includes an extension plate, and the front body and the rear body are provided with extension plate mounting grooves recessed inwardly, and the extension plate is rotatably connected to the extension plate mounting groove via a rotating shaft.

[0008] In the above-mentioned length-adjustable flatbed trailer, the chassis includes a main beam arranged along the length direction of the trailer body, and side support plates are symmetrically arranged on both sides of the main beam, and the wheels are installed on the side support plates.

[0009] In the above-mentioned length-adjustable flatbed trailer, limit plates are provided on both sides of the bottom of the front body and the rear body, the lower end faces of the limit plates are supported on the side support plates, and the main beam is located between the two limit plates.

[0010] In the above-mentioned length-adjustable flatbed trailer, both sides of the main beam are inwardly recessed to provide limit slots, and the limit plate is protruded with limit blocks inserted into the limit slots.

[0011] In the above-mentioned length-adjustable flatbed trailer, the vehicle body fastening structure includes fastening bolts screwed onto the side support plates, and the inner ends of the fastening bolts can abut against the limit plates.

[0012] In the above-mentioned length-adjustable flatbed trailer, an extension plate supporting structure is further provided on the main beam.

[0013] In the above-mentioned length-adjustable flatbed trailer, the extension plate support structure includes a support plate mounting groove arranged in the middle of the upper end surface of the main beam and recessed inward, and an extension plate support plate driven by a No. 1 lifting drive is arranged in the support plate mounting groove.

[0014] In the above-mentioned length-adjustable flatbed trailer, a telescopic vehicle body leveling component is also provided in the extension plate mounting groove.

[0015] In the above-mentioned length-adjustable flatbed trailer, the telescopic body paving assembly includes a paving plate arranged in the extension plate installation groove and located on the lower side of the extension plate, and a second lifting driver that can drive the paving plate to rise and fall in the vertical direction.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. The front and rear bodies can slide forward and backward on the chassis to adjust the overall length of the trailer body. After the adjustment is completed, the positions of the front and rear bodies are fixed by the body fastening structure. When the front and rear bodies move forward and backward respectively to extend the trailer body, the foldable body extension structure can extend an extension plate from the front and rear bodies to cover the chassis.

[0018] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view of the utility model;

[0020] Figure 2 It is a top view of the utility model after extension;

[0021] Figure 3 It is a cross-sectional view of the utility model;

[0022] Figure 4 It is the main view of the present utility model.

[0023] In the figure, chassis 1, trailer body 2, front body 3, rear body 4, foldable body extension structure 5, extension plate 6, extension plate mounting groove 7, main beam 8, side support plate 9, limit plate 10, limit slide groove 11, limit block 12, fastening bolt 13, No. 1 lifting drive 14, extension plate support plate 15, paving plate 16, No. 2 lifting drive 17. DETAILED DESCRIPTION

[0024] like Figures 1-4 As shown, a length-adjustable flatbed trailer includes a chassis 1 and a trailer body 2 arranged on the chassis 1, wherein the trailer body 2 includes a front body 3 and a rear body 4, and the front body 3 and the rear body 4 are slidably matched with the chassis 1. The chassis 1 is also provided with a body fastening structure, and the inner sides of the front body 3 and the rear body 4 are also provided with a foldable body extension structure 5.

[0025] In the present invention, the front body 3 and the rear body 4 can slide forward and backward on the chassis to adjust the overall length of the trailer body. After the adjustment is completed, the positions of the front body and the rear body are fixed by the body fastening structure. After the front body and the rear body move forward and backward respectively to extend the trailer body, the foldable body extension structure 5 can extend an extension plate from the front body and the rear body to cover the chassis.

[0026] Specifically, the foldable vehicle body extension structure 5 includes an extension plate 6. Extension plate mounting slots 7 are recessed inwardly on the front and rear vehicle bodies 3 and 4. The extension plate 6 is pivotally connected to the extension plate mounting slots 7 via a rotating shaft. After the front and rear vehicle bodies move forward and backward, respectively, the extension plates can be rotated to flip over and cover the upper side of the chassis.

[0027] Specifically, the chassis 1 includes a main beam 8 arranged along the length of the trailer body 2. Side support plates 9 are symmetrically arranged on both sides of the main beam 8. The wheels are mounted on the side support plates 9. Limit plates 10 are provided on both sides of the bottom of the front body 3 and the rear body 4. The lower end surfaces of the limit plates 10 are supported on the side support plates 9. The main beam 8 is located between the two limit plates 10. The limit plates 10 and the side support plates 9 allow the trailer body to be slidably supported on the chassis.

[0028] Preferably, both sides of the main beam 8 are inwardly recessed with limit slots 11, and the limit plate 10 is protruding with limit blocks 12 inserted into the limit slots 11. The limit slots cooperate with the limit blocks to limit the trailer body up and down.

[0029] Specifically, the vehicle body fastening structure includes a fastening bolt 13 screwed onto the side support plate 9, the inner end of the fastening bolt 13 can abut against the limit plate 10. After the front and rear vehicle bodies are adjusted, the front and rear vehicle bodies can be fixed by tightening the fastening bolts.

[0030] Preferably, the main beam 8 is further provided with an extension plate support structure. The extension plate support structure includes a support plate mounting groove provided in the middle of the upper end surface of the main beam 8 and recessed inwardly. The support plate mounting groove houses an extension plate support plate 15 driven by a first lifting actuator 14. When the extension plate is flipped over, the outer end of the extension plate cannot be effectively supported due to its height being higher than the main beam of the chassis, making it susceptible to distortion. The first lifting actuator can drive the extension plate support plate upward to support the extension plate, thus preventing damage to the extension plate.

[0031] Specifically, combined Figure 1-Figure 3 As shown, a retractable body-leveling assembly is also installed within the extension plate mounting slot 7. This assembly includes a paving plate 16, which is positioned within the extension plate mounting slot 7 and below the extension plate 6, and a second lift actuator 17 that drives the paving plate 16 vertically upward and downward. When the extension plate is flipped over to the upper side of the chassis' main beam, a recess forms in the extension plate mounting slot, allowing the second lift actuator to move the paving plate upward until its top is flush with the trailer body.

[0032] Those skilled in the art should understand that the No. 1 lifting driver and the No. 2 lifting driver can be oil cylinders, air cylinders or linear motors, etc. Preferably, oil cylinders are used in the present invention.

[0033] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0034] Although this article uses the chassis 1, trailer body 2, front body 3, rear body 4, foldable body extension structure 5, extension plate 6, extension plate mounting groove 7, main beam 8, side support plate 9, limit plate 10, limit slide 11, limit block 12, fastening bolt 13, No. 1 lifting drive 14, extension plate support plate 15, paving plate 16, No. 2 lifting drive 17, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restriction is contrary to the spirit of the present invention.

Claims

1. A length-adjustable flatbed trailer comprising a chassis (1) and a trailer body (2) arranged on the chassis (1), characterized in that: The trailer body (2) comprises a front body (3) and a rear body (4), wherein the front body (3) and the rear body (4) are slidably matched with the chassis (1), the chassis (1) is further provided with a body fastening structure, and the inner sides of the front body (3) and the rear body (4) are further provided with a foldable body extension structure (5).

2. The length-adjustable flatbed trailer according to claim 1, characterized in that: The foldable vehicle body extension structure (5) includes an extension plate (6). The front vehicle body (3) and the rear vehicle body (4) are provided with an extension plate installation groove (7) which is recessed inwardly. The extension plate (6) is rotatably connected to the extension plate installation groove (7) via a rotating shaft.

3. The length-adjustable flatbed trailer according to claim 2, characterized in that: The chassis (1) comprises a main beam (8) arranged along the length direction of the trailer body (2), side support plates (9) are symmetrically arranged on both sides of the main beam (8), and wheels are installed on the side support plates (9).

4. The length-adjustable flatbed trailer according to claim 3, characterized in that: Limiting plates (10) are provided on both sides of the bottom of the front vehicle body (3) and the rear vehicle body (4), the lower end surfaces of the limiting plates (10) are supported on the side support plates (9), and the main beam (8) is located between the two limiting plates (10).

5. The length-adjustable flatbed trailer according to claim 4, characterized in that: The two sides of the main beam (8) are inwardly recessed with limiting sliding grooves (11), and the limiting plate (10) is protruded with limiting blocks (12) inserted into the limiting sliding grooves (11).

6. The length-adjustable flatbed trailer according to claim 5, characterized in that: The vehicle body fastening structure comprises a fastening bolt (13) screwed onto the side support plate (9), and the inner end of the fastening bolt (13) can abut against the limiting plate (10).

7. The length-adjustable flatbed trailer according to any one of claims 3 to 6, characterized in that: An extension plate supporting structure is also provided on the main beam (8).

8. The length-adjustable flatbed trailer according to claim 7, characterized in that: The extension plate support structure includes a support plate installation groove arranged in the middle of the upper end surface of the main beam (8) and recessed inwardly, and an extension plate support plate (15) driven by a No. 1 lifting driver (14) is arranged in the support plate installation groove.

9. The length-adjustable flatbed trailer according to any one of claims 2 to 6, characterized in that: A telescopic vehicle body leveling component is also provided in the extension plate installation groove (7).

10. The length-adjustable flatbed trailer according to claim 9, characterized in that: The telescopic vehicle body paving assembly comprises a paving plate (16) arranged in the extension plate installation groove (7) and located on the lower side of the extension plate (6), and a second lifting driver (17) capable of driving the paving plate (16) to rise and fall in the vertical direction.

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