Support structure for trailer tailgate lift

Abstract

This utility model discloses a support structure for lifting and lowering a trailer tailgate, relating to the field of trailer tailgate connection technology. The structure includes a support frame, a diagonal brace, a support arm, a hydraulic cylinder, and a force-distributing plate. The diagonal brace is fixed to the support frame. Mounting seat a (including mounting plate a) and mounting seat b (including mounting plate b) are mounted on the support frame. The support arm and the hydraulic cylinder are connected at both ends to the mounting seats and the trailer tailgate, respectively. The force-distributing plate connects the mounting seats and the diagonal brace. By distributing load through multi-path force transmission, it improves structural strength and stability, avoids hydraulic cylinder axis misalignment, extends service life, and ensures safe and efficient tailgate lifting and lowering.

Description

Technical Field

[0001] This utility model relates to the field of trailer tailgate connection technology, and in particular to a support structure for lifting and lowering trailer tailgates. Background Technology

[0002] In the field of modern logistics and transportation, the trailer tailgate is a key device for achieving rapid loading and unloading of goods, and its lifting stability and structural reliability directly affect transportation efficiency and operational safety. Currently, the mainstream lifting drive method for trailer tailgates in the industry is hydraulic cylinder lifting. This method is widely used in various trailer equipment due to its advantages such as stable power output and convenient operation.

[0003] In the traditional hydraulic cylinder driven tailgate structure design, the hydraulic cylinder is usually fixedly mounted on an independent support plate via a base, and the support plate is then connected to the trailer frame or the main structure of the tailgate.

[0004] When the hydraulic cylinder starts and lifts the tailgate upwards, the weight of the tailgate itself, the load of the cargo, and the lifting force output by the hydraulic cylinder are concentrated and transferred to the connection between the hydraulic cylinder base and the support plate. Since this connection needs to directly bear the concentrated longitudinal load, and traditional support plates mostly adopt a flat plate structure, the local structural strength and deformation resistance of the installation area are often difficult to match the actual stress requirements. As a result, during long-term, high-frequency lifting operations, the installation part of the support plate corresponding to the hydraulic cylinder base is prone to problems such as dents and deformation due to stress concentration. Therefore, in order to improve the support force for the hydraulic cylinder, this device proposes a support structure for lifting the trailer tailgate. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a support structure for lifting and lowering the tail section of a trailer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] The support structure for the trailer tailgate lifting mechanism includes:

[0008] Support frame;

[0009] Diagonal bracing plate, the diagonal bracing plate being fixedly installed on the support frame;

[0010] Mounting base a and mounting base b are respectively mounted on the support frame;

[0011] A support arm, one end of which is rotatably mounted on a mounting base a, and the other end of which is rotatably mounted on the bottom wall of the trailer tailboard;

[0012] The hydraulic cylinder has one end rotatably mounted on the mounting base b and the other end rotatably mounted on the bottom wall of the trailer tailboard.

[0013] Force distribution plates are installed on both the mounting base A and the mounting base B, and the other ends of the force distribution plates are fixedly connected to the outer wall of the diagonal brace plate.

[0014] The above technical solution further includes: The support frame is in a "U" shape.

[0015] Furthermore, the mounting base A includes two mounting plates A, the force distribution plate is connected to the outer wall of the mounting plate A, a through hole is provided on the outer wall of the support frame, the side of the mounting plate A movably penetrates through the through hole A and extends to the other side of the support frame, and the mounting plate A is fixedly welded in the through hole A.

[0016] Furthermore, the mounting base B includes two mounting plates B, the force distribution plate is connected to the outer wall of the mounting plate B, a through hole B is provided on the outer wall of the support frame, the side of the mounting plate B movably penetrates through the through hole B and extends to the other side of the support frame, and the mounting plate B is fixedly welded in the through hole B.

[0017] Furthermore, grease filling cylinders are respectively installed on the mounting base A and the mounting base B, and a cover is threadedly installed on the grease filling cylinder.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] In the present utility model, a support frame and a diagonal brace plate are provided, and a force distribution plate is installed on the mounting base. The auxiliary force transmission structure composed of the diagonal brace plate and the force distribution plate can decompose the longitudinal load generated during the jacking of the oil cylinder into longitudinal and oblique bidirectional forces, reducing the stress value at the installation part in the traditional structure and avoiding problems such as depression and deformation caused by local overloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the support structure for the lifting of the trailer tailboard proposed by the present utility model;

[0021] Figure 2 is the structural schematic diagram of the use state of the present utility model.

[0022] Figure 3 is the cross-sectional structural schematic diagram of the present utility model.

[0023] In the figure:

[0024] 100, trailer tailboard;

[0025] 10, support frame; 11, diagonal brace plate;

[0026] 20, support arm; 21, mounting plate A; 22, grease filling cylinder; 23, cover;

[0027] 30. Oil cylinder; 31. Mounting plate b;

[0028] 40. Force dividing plate. Specific implementation manner

[0029] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] Embodiment 1

[0031] Refer to the attached Figure 1-3 , the support structure for the lifting of the trailer tailboard includes: support frame 10; inclined support plate 11, support arm 20, oil cylinder 30 and force dividing plate 40.

[0032] Specifically, the inclined support plate 11 is fixedly installed on the support frame 10; mounting seat a and mounting seat b, the mounting seat a and the mounting seat b are respectively installed on the support frame 10; one end of the support arm 20 is rotatably installed on the mounting seat a, and the other end is rotatably installed on the bottom wall of the trailer tailboard 100; one end of the oil cylinder 30 is rotatably installed on the mounting seat b, and the other end is rotatably installed on the bottom wall of the trailer tailboard 100; force dividing plates 40 are installed on both the mounting seat a and the mounting seat b, and the other end of the force dividing plate 40 is fixedly connected to the outer wall of the inclined support plate 11. Among them, the welding position between the support frame 10 and the inclined support plate 11 is fully welded to ensure that the connection strength between the two meets the load requirements; the pin shafts at both ends of the support arm 20 and the oil cylinder 30 are made of 45 steel and are quenched and tempered, and the surface hardness reaches HRC28 - 32 to improve wear resistance and anti-shear ability.

[0033] In one embodiment of the present utility model, the support frame 10 is in a "C" shape. Among them, compared with the traditional flat support plate, this structure can improve the longitudinal bending strength and torsional resistance through the groove-shaped structure formed by the two side plates and the top plate.

[0034] In one embodiment of the present utility model, the mounting seat a includes two mounting plates a21, the force dividing plate 40 is connected to the outer wall of the mounting plate a21, through holes are provided on the outer wall of the support frame 10, the side of the mounting plate a21 movably penetrates through the through hole a and extends to the other side of the support frame 10, and the mounting plate a21 is welded and fixed in the through hole a. Among them, the mounting plate a21 is made of Q235 steel and its length exceeds the outer walls on both sides of the support frame 10 to facilitate the installation of the force dividing plate 40 and the support arm 20; the aperture of the through hole a is adapted to the thickness of the mounting plate a21, which is convenient for the mounting plate a21 to penetrate and avoids installation deviation caused by excessive gaps.

[0035] Mounting base b includes two mounting plates b31. A force-distributing plate 40 is connected to the outer wall of the mounting plate b31. A through hole b is provided on the outer wall of the support frame 10. The side of the mounting plate b31 extends through the through hole b to the other side of the support frame 10. The mounting plate b31 is welded and fixed within the through hole b. The material and thickness of the mounting plate b31 are consistent with those of the mounting plate a21. The through hole b is positioned parallel to the through hole a, and the distance between them is determined by the installation angle of the support arm 20 and the hydraulic cylinder 30, ensuring no movement interference between the support arm 20 and the hydraulic cylinder 30 when the trailer tailgate 100 is raised or lowered.

[0036] In one embodiment of this utility model, grease filling cylinders 22 are respectively installed on mounting base a and mounting base b, and caps 23 are threaded onto the grease filling cylinders 22. The grease filling cylinders 22 are made of seamless steel pipe, and their internal channels are connected to the pin mounting holes on mounting plates a21 and b31, facilitating the periodic addition of lubricating grease to the rotating parts of the pins and reducing wear; the caps 23 seal the filling port to prevent dust.

[0037] In this embodiment, when it is necessary to drive the trailer tailgate 100 to rise or fall, the hydraulic cylinder 30 is activated, the piston rod of the hydraulic cylinder 30 extends or retracts, and the support arm 20 works together with the hydraulic cylinder 30 to apply force to the trailer tailgate 100, so as to achieve smooth raising and lowering of the tailgate; during this process, the force distribution plate 40 transmits the longitudinal load borne by the mounting seat a and mounting seat b to the diagonal brace plate 11, and the diagonal brace plate 11 then distributes the load to the support frame 10, forming a multi-path force transmission system of "hydraulic cylinder / support arm-mounting seat-force distribution plate-diagonal brace plate-support frame", which effectively avoids local stress concentration.

[0038] The maximum extension stroke of the hydraulic cylinder 30 is determined according to the lifting height requirement of the trailer tailgate 100; the length of the support arm 20 must match the stroke of the hydraulic cylinder 30 to ensure that the tailgate remains horizontal during lifting and lowering, and to prevent the cargo from tilting.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A support structure for lifting and lowering the tailgate of a trailer, characterized in that, Comprising: Support frame (10); Diagonal brace plate (11), which is fixedly installed on the support frame (10); Mounting seat a and mounting seat b, which are respectively installed on the support frame (10); Support arm (20), one end of which is rotatably installed on mounting seat a, and the other end is rotatably installed on the bottom wall of the trailer tailgate (100); Hydraulic cylinder (30), one end of which is rotatably installed on mounting seat b, and the other end is rotatably installed on the bottom wall of the trailer tailgate (100); Force splitting plate (40), which is installed on both mounting seat a and mounting seat b, and the other end of the force splitting plate (40) is fixedly connected to the outer wall of the diagonal brace plate (11).

2. The support structure for lifting and lowering the trailer tailgate according to claim 1, characterized in that, The support frame (10) is in a "C" shape.

3. The support structure for lifting and lowering the trailer tailgate according to claim 2, characterized in that, The mounting seat a includes two mounting plates a (21), the force splitting plate (40) is connected to the outer wall of the mounting plate a (21), a through hole is provided on the outer wall of the support frame (10), the side of the mounting plate a (21) movably penetrates through the through hole a and extends to the other side of the support frame (10), and the mounting plate a (21) is welded and fixed in the through hole a.

4. The support structure for lifting and lowering the trailer tailgate according to claim 3, characterized in that, The mounting seat b includes two mounting plates b (31), the force splitting plate (40) is connected to the outer wall of the mounting plate b (31), a through hole b is provided on the outer wall of the support frame (10), the side of the mounting plate b (31) movably penetrates through the through hole b and extends to the other side of the support frame (10), and the mounting plate b (31) is welded and fixed in the through hole b.

5. The support structure for lifting and lowering the trailer tailgate according to claim 4, characterized in that, Grease filling cylinders (22) are respectively installed on the mounting seat a and the mounting seat b, and a cover (23) is threadedly installed on the grease filling cylinder (22).

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