A load trailer deck structure
Patent Information
- Application Number
- CN202522549268.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-12-01
AI Technical Summary
[0002]在市政、燃气等工程领域的PE管道运输作业中，传统载重拖车拖板的载物面积多为固定规格（如常见的11.5m×2.2m），而实际应用中PE管道的长度常根据施工需求定制（例如12m、15m等超长规格），二者尺寸匹配度较低，当PE管道长度超出拖板额定尺寸时，管道的一端会自然超出于拖板的端部边缘，此时该超出部分处于完全悬空的无支撑状态，受 PE管道自身重量影响，悬空端会逐渐下垂，若运输路段存在颠簸、急刹等工况，下垂的管道端部会随车辆动态产生大幅摆动，一方面易造成管道接口处应力集中、出现裂纹或变形（尤其大口径 PE 管道，自重可达数吨，下垂变形量甚至超过管道允许的弯曲公差），另一方面，摆动的管道端部可能脱离拖板的约束范围，存在从拖板滑落的风险，不仅会导致管道本身的破损报废，还可能引发道路运输安全事故，显著提升了运输过程中的安全隐患与物料损耗成本
本实用新型通过第一板体顶部收纳槽中的调节丝杆，当转动调节丝杆时，可以调节第二板体处于第一板体上面的位置，可灵活调整拖板有效载物长度，通过调节支撑的有效面积，对超长PE管道超出端形成稳定支撑，避免管道下垂变形、滚动偏移及脱落风险，提升运输安全性与拖板适配性。
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Figure CN224797072U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of trailer trailer technology, specifically a heavy-duty trailer trailer structure. Background Technology
[0002] In the transportation of PE pipelines in municipal and gas engineering projects, the carrying area of traditional heavy-duty trailers is mostly of a fixed specification (such as the common 11.5m × 2.2m). However, in actual applications, the length of PE pipelines is often customized according to construction needs (such as extra-long specifications such as 12m and 15m). The size matching between the two is low. When the length of the PE pipeline exceeds the rated size of the trailer, one end of the pipeline will naturally extend beyond the edge of the trailer. At this time, the extended part is in a completely suspended and unsupported state. Affected by the weight of the PE pipeline itself, the suspended end will gradually sag. If there are bumps or sudden braking conditions on the transportation section, the sag of the pipeline end will swing significantly with the dynamics of the vehicle. On the one hand, it is easy to cause stress concentration at the pipeline joint, resulting in cracks or deformation (especially for large-diameter PE pipelines, which can weigh several tons, and the amount of sag deformation may even exceed the allowable bending tolerance of the pipeline). On the other hand, the swinging pipeline end may break out of the restraint range of the trailer, posing a risk of slipping off the trailer. This will not only lead to the damage and scrapping of the pipeline itself, but may also cause road transportation safety accidents, significantly increasing the safety hazards and material loss costs during transportation. Utility Model Content
[0003] The purpose of this utility model is to provide a heavy-duty trailer trailer structure to solve the problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a first plate and a frame assembled at the bottom of the first plate, wherein a front connecting seat is fixedly connected to one end of the frame; The top of the first plate has a storage groove, and the second plate is arranged inside the storage groove. An adjusting screw is rotatably connected to one side of the first plate. One end of the adjusting screw passes through the inside of the storage groove and is threadedly connected to the second plate. The bottom of the first plate is provided with a main wheel axle bracket mounting seat and a secondary wheel axle bracket mounting seat. The main wheel axle bracket mounting seat is fixed to the bottom of the frame, and the secondary wheel axle bracket mounting seat is fixed to both sides of the second plate.
[0005] In a further embodiment, the frame consists of two symmetrically designed main beams fixedly connected to the first plate, a plurality of crossbeams equidistantly fixed between the two main beams, and connecting beams fixedly connected between the main beams and the crossbeams.
[0006] In a further embodiment, both the top of the first plate and the second plate are provided with anti-slip textures, and a baffle is fixedly connected to the top of the first plate and to one side of the first plate.
[0007] In a further embodiment, the storage groove is symmetrically provided with limiting grooves inside, and the second plate is equipped with a limiting slider that is slidably connected to the limiting groove.
[0008] In a further embodiment, sliding grooves are provided on both sides of the first plate, and a sliding beam fixedly connected to the second plate is slidably connected inside the sliding groove.
[0009] In a further embodiment, a plurality of equidistant fence mounting seats are fixed to both the front and back of the first plate.
[0010] In a further embodiment, a drive unit is mounted on one side of the first plate, and the drive unit is used in conjunction with an adjusting screw.
[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes an adjusting screw in the top slot of the first plate. When the adjusting screw is rotated, the position of the second plate above the first plate can be adjusted, allowing for flexible adjustment of the effective load length of the trailer. By adjusting the effective support area, stable support is provided for the extended end of the extra-long PE pipe, avoiding the risks of pipe sagging, deformation, rolling deviation, and detachment, thus improving transportation safety and trailer compatibility. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a partial bottom view of an embodiment of the present utility model; Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model; Figure 4 This is a schematic diagram of the second plate body in an embodiment of the present utility model.
[0013] In the diagram: 1. First plate; 2. Frame; 201. Main beam; 202. Crossbeam; 203. Connecting beam; 3. Head connecting seat; 4. Storage slot; 5. Second plate; 6. Adjusting screw; 7. Main wheel axle bracket mounting seat; 8. Secondary wheel axle bracket mounting seat; 9. Anti-slip texture; 10. Baffle; 11. Limiting groove; 12. Limiting slider; 13. Sliding groove; 14. Sliding beam; 15. Fence mounting seat; 16. Drive unit. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] This embodiment discloses a heavy-duty trailer flatbed structure, including a first flatbed 1 and a frame 2 assembled at the bottom of the first flatbed 1. One end of the frame 2 is fixedly connected to a front connecting seat 3. The frame 2 consists of two symmetrically designed main beams 201 fixedly connected to the first flatbed 1, multiple crossbeams 202 equidistantly fixed between the two main beams 201, and connecting beams 203 fixedly connected between the main beams 201 and the crossbeams 202. Figure 1 , Figure 2 As shown in Figure 3, the first plate 1 serves as the core working surface of the trailer, directly bearing goods such as PE pipes. Its flat surface structure ensures even weight distribution, preventing localized stress concentration that could damage the pipes or plate. The first plate 1 is rigidly connected to the frame 2, stably transferring the vertical load of the goods to the frame 2. Additionally, the anti-slip texture 9 and baffle 10 on its top further restrict the displacement of goods during transport, meeting the anti-slip and anti-rolling requirements of the cylindrical structure of the PE pipes and ensuring the stability of the goods. The frame 2, as the core load-bearing skeleton of the trailer, is the key structure supporting the first plate 1 and distributing the load of the goods. The main beam 201, the main load-bearing component of the frame 2, adopts a symmetrical design and is fixedly connected to the first plate 1. It evenly transfers the weight of the goods and the self-weight of the trailer from the first plate 1 along the length to the wheel axle bracket mounting seat, preventing localized overload. Simultaneously, the main beam 201 serves as the longitudinal foundation of the frame 2, providing a sliding base for the auxiliary wheel axle bracket. The system provides an installation benchmark to ensure structural stability when the telescopic plate expands. The crossbeams 202 are equidistantly fixed between the two main beams 201, which enhances the bending stiffness of the frame 2 laterally, offsets the lateral stress caused by uneven loading of goods or road bumps, and prevents the main beams 201 from deforming to both sides. The multiple equidistant crossbeams 202 can decompose concentrated loads into distributed loads, reducing the stress intensity at a single point. The connecting beam 203 serves as an auxiliary connecting component between the main beams 201 and the crossbeams 202, filling the structural gap between the main beams 201 and the crossbeams 202, strengthening the connection strength and overall coordination between the two, avoiding weld cracking at the connection between the crossbeams 202 and the main beams 201 due to repeated vibration, improving the torsional performance of the frame 2, and adapting to the heavy-duty transportation needs of complex road conditions such as gravel roads and slopes in construction sites. The front connecting seat 3 serves as the core connection node between the trailer and the tractor head. Its rigid connection structure can stably transmit the traction and braking forces of the tractor, ensuring that the trailer and the tractor start, stop, and turn synchronously.
[0016] More specifically, a storage groove 4 is formed at the top of the first plate 1, and a second plate 5 is arranged inside the storage groove 4. An adjusting screw 6 is rotatably connected to one side of the first plate 1. One end of the adjusting screw 6 passes through the interior of the storage groove 4 and is threadedly connected to the second plate 5. A main wheel axle bracket mounting seat 7 and a secondary wheel axle bracket mounting seat 8 are respectively provided at the bottom of the first plate 1. The main wheel axle bracket mounting seat 7 is fixed to the bottom of the frame 2, and the secondary wheel axle bracket mounting seat 8 is fixed to both sides of the second plate 5. A drive unit 16 is assembled on one side of the first plate 1. The drive unit 16 works in conjunction with the adjusting screw 6, such as... Figure 1 , Figure 3 As shown in Figure 4, the receiving groove 4 serves as the receiving and guiding carrier for the second plate 5. On the one hand, when the second plate 5 is not extended, it is completely received inside the first plate 1, ensuring the flatness of the loading surface of the trailer base and not affecting the transportation of goods of standard size. On the other hand, it provides precise guidance for the extension and retraction of the second plate 5, restricting its displacement direction and avoiding deviation or jamming during the extension and retraction process, ensuring that the second plate 5 extends and retracts stably along a straight line. As an expandable loading extension structure, the second plate 5 increases the overall loading length of the trailer by extending out of the receiving groove 4, and is specifically adapted for the transportation of extra-long PE pipes. This design ensures the pipe fully conforms to the carrying surface of the pallet, preventing it from being suspended due to excessive length. Together with the first plate 1, it forms a continuous load-bearing surface, distributing the weight of the extra-long pipe and reducing the risk of localized pressure deformation. The adjusting screw 6, as the core transmission component for the extension and retraction of the second plate 5, utilizes the precision of threaded transmission to convert the rotational motion of the drive unit 16 into the linear extension and retraction motion of the second plate 5. This allows for precise control of the extension length of the second plate 5, adapting to the transportation needs of extra-long PE pipes of different specifications. The self-locking characteristic of the threaded connection automatically locks after the second plate 5 is adjusted to the target length. To prevent the second plate 5 from shifting due to vibration and bumps during transportation, the drive unit 16 provides a power source for the adjusting screw 6, replacing manual rotation of the screw, reducing operational intensity, and improving the efficiency of the extension and retraction adjustment of the second plate 5. By controlling the start, stop, and direction of the drive unit 16, the rotation direction and angle of the adjusting screw 6 can be precisely controlled, realizing automated and precise adjustment of the extension and retraction of the second plate 5. The drive unit 16 is preferably a reducer combined with a motor. The main wheel axle bracket mounting base 7 serves as the fixed mounting base for the main wheel axle bracket, firmly connecting to the bottom of the frame 2 and bearing the load of the trailer body and normal loads. The weight of the main wheel axle is transferred to the main wheel axle. Its fixed connection ensures the stability of the main wheel axle position, providing basic support and travel capability for the trailer. The auxiliary wheel axle bracket mounting seat 8 is synchronously linked with the second plate 5, adjusting its position as the second plate 5 extends and retracts, providing a mounting fulcrum for the auxiliary wheel axle bracket. When the second plate 5 extends to carry the extra-long PE pipe, the wheels on the auxiliary wheel axle bracket bear the weight of the second plate 5 and the excess part of the extra-long pipe through the auxiliary wheel axle bracket mounting seat 8, forming auxiliary support, distributing the load of the main wheel axle, avoiding single-axle overload, and ensuring the travel stability of the trailer after extension.
[0017] Furthermore, both the top of the first plate 1 and the second plate 5 are provided with anti-slip textures 9, a baffle 10 is fixedly connected to the top of the first plate 1 and to one side of the first plate 1, and multiple equidistant fence mounting seats 15 are fixedly connected to the front and back of the first plate 1, such as... Figure 1 As shown, anti-slip textures 9 are provided on the top of the first plate 1 and the second plate 5, which can significantly increase the friction between the PE pipe and the plate surface, counteract the inertial force caused by vehicle starting, braking, and bumps during transportation, and prevent the cylindrical PE pipe from sliding or rolling off the plate surface. At the same time, the anti-slip textures 9 increase the contact area, which can disperse the local pressure on the pipe and prevent wear and scratches caused by hard contact between the pipe and the plate, thus protecting the integrity of the pipe structure. The baffle 10 fixed to one side of the first plate 1 forms a longitudinal blocking structure, which can limit the end of the PE pipe placed on the plate and restrict the displacement of the pipe along the length of the drag plate. To prevent the pipeline from lurching towards the front of the vehicle due to sudden braking, driving on slopes, or other operating conditions, the stability of cargo transportation is further enhanced. In addition, the baffle 10 can also play a positioning role when loading and unloading pipelines, assisting in quickly aligning the pipeline placement position. The fence mounting seats 15, which are equidistantly arranged on the front and back of the first plate 1, provide standardized and stable installation support points for the detachable fence. The fence can be quickly assembled according to the transportation needs of PE pipelines to form a lateral protection structure, preventing the pipeline from rolling down along the width of the trailer. The equidistant arrangement of the mounting seats is adapted to the limiting requirements of pipelines of different lengths, and the assembly form of the detachable fence takes into account flexibility, as it can be removed when the fence is not needed.
[0018] Finally, symmetrical limiting grooves 11 are formed inside the storage slot 4. A limiting slider 12, slidably connected to the limiting groove 11, is mounted on the second plate 5. Sliding grooves 13 are formed on both sides of the first plate 1, and sliding beams 14, fixedly connected to the second plate 5, are slidably connected inside the sliding grooves 13. Figure 1 , Figure 2 , Figure 3As shown in Figure 4, the limiting groove 11 provides precise sliding guidance for the limiting slider 12. Together, they restrict the displacement trajectory of the second plate 5 within the receiving groove 4, allowing it to extend and retract linearly only along the length of the slide plate, preventing lateral or vertical displacement of the second plate 5 during extension and retraction. Simultaneously, the fitted sliding structure of the slider and groove disperses the radial force borne by the second plate 5, preventing damage to the adjusting screw 6 due to excessive force on one side, ensuring the smoothness of the extension and retraction action and structural durability. This makes it suitable for heavy-duty ultra-long PE pipe transportation scenarios. The moving groove 13 is opened on both sides of the first plate 1 to provide external sliding support for the sliding beam 14. It forms an "inner + outer" dual guiding system with the limiting sliding groove 11 in the receiving groove 4, which further enhances the expansion and contraction stability of the second plate 5. The sliding beam 14 is fixed to the second plate 5 and can bear part of the load at the extended end of the second plate 5, preventing the second plate 5 from bending and deforming due to excessive suspension. At the same time, it limits the torsional displacement of the second plate 5 during expansion and contraction, ensuring that the expanded load surface always remains flat and preventing the PE pipe from experiencing uneven stress due to plate surface distortion.
[0019] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.
[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A heavy-duty trailer flatbed structure, comprising a first flatbed (1) and a frame (2) assembled at the bottom of the first flatbed (1), characterized in that: One end of the frame (2) is fixedly connected to the front connecting seat (3); The top of the first plate (1) is provided with a storage groove (4), and the inside of the storage groove (4) is provided with a second plate (5). An adjusting screw (6) is rotatably connected to one side of the first plate (1). One end of the adjusting screw (6) passes through the inside of the storage groove (4) and is threadedly connected to the second plate (5). The bottom of the first plate (1) is provided with a main wheel axle bracket mounting seat (7) and a secondary wheel axle bracket mounting seat (8). The main wheel axle bracket mounting seat (7) is fixed to the bottom of the frame (2), and the secondary wheel axle bracket mounting seat (8) is fixed to both sides of the second plate (5).
2. The heavy-duty trailer flatbed structure according to claim 1, characterized in that: The frame (2) consists of two symmetrically designed main beams (201) fixedly connected to the first plate (1), multiple crossbeams (202) fixedly connected at equal intervals between the two main beams (201), and connecting beams (203) fixedly connected between the main beams (201) and the crossbeams (202).
3. The heavy-duty trailer flatbed structure according to claim 1, characterized in that: The top of the first plate (1) and the second plate (5) are provided with anti-slip texture (9), and a baffle (10) is fixedly connected to the top of the first plate (1) and to one side of the first plate (1).
4. The heavy-duty trailer flatbed structure according to claim 1, characterized in that: The storage slot (4) has symmetrically opened limit grooves (11) inside, and the second plate (5) is equipped with a limit slider (12) that is slidably connected to the limit groove (11).
5. The heavy-duty trailer flatbed structure according to claim 1, characterized in that: The first plate (1) has sliding grooves (13) on both sides, and the sliding grooves (13) are slidably connected to the sliding beams (14) that are fixed to the second plate (5).
6. The heavy-duty trailer flatbed structure according to claim 1, characterized in that: Multiple fence mounting seats (15) are fixed to the front and back of the first plate (1) at equal intervals.
7. The heavy-duty trailer flatbed structure according to claim 1, characterized in that: A drive unit (16) is mounted on one side of the first plate (1), and the drive unit (16) is used in conjunction with the adjusting screw (6).