Low-flatbed semitrailer ladder stand and low-flatbed semitrailer carriage

Abstract

The utility model provides a low flatbed semitrailer ladder stand and low flatbed semitrailer carriage, including the fixed ladder stand end that is aslant arranged at the tail of cargo carrying platform, the tail of fixed ladder stand end is hinged with a plurality of groups of movable ladder stand ends in the turnable way, the plurality of groups of movable ladder stand ends can move left and right along the hinge point, and in the folded state, the movable ladder stand ends can move left and right along the hinge point. The top faces of the movable ladder stand ends are flush with the top face of the cargo carrying platform. According to the ladder stand of the low-bed semitrailer, the ladder stand is designed to be of a structure which can be folded to be flush with the cargo carrying platform of the semitrailer, so that a compression spring of a conventional ladder stand can be omitted, the manufacturing cost is reduced, the length of the cargo carrying platform can be effectively increased, and loading of more cargoes can be met. Meanwhile, the left part and the right part of a conventional ladder stand are divided into four parts, and a single-hinged structure is adjusted into a double-hinged structure, so that the single ladder stand is small in size, light in weight and convenient to operate by a single person.

Description

Technical Field

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

[0002] At present, a reversible spring ladder is usually installed at the rear of a low-bed semi-trailer for construction machinery to go up and down. The rear end of the ladder is connected to the rear end of the frame by a fixed seat and a pin. When in use, the ladder is lowered to the top to contact the ground. After use, the top of the ladder needs to be manually lifted to put the ladder away. Since the ladder itself is heavy, the pressure of the compression spring is difficult to control, and it occupies the length of the vehicle, making the driver's operation time-consuming and laborious, and the effective utilization rate of the vehicle length is low.

[0003] The utility model with the authorization announcement number CN 207416707 U discloses a low-bed semi-trailer ladder structure, wherein a connecting plate B is provided on the frame, and two connecting plates A are provided at the lower end of the movable platform, and the two connecting plates A are connected to the connecting plate B through the pin shaft A, and the movable platform flips with the pin shaft A as the axis; the two sides of the frame are also symmetrically provided with connecting plates C, and the hydraulic cylinder is connected and fixed to the connecting plate C through the pin shaft B, and the top of the hydraulic cylinder is connected to the movable platform. The low-bed semi-trailer ladder structure makes the movable platform contact with the ground, which is convenient for the loader to get on the vehicle, does not occupy the length of the whole vehicle, improves the utilization rate of the effective length of the vehicle, enables the loader to get on the vehicle quickly and conveniently, and reduces the labor intensity of the driver, but the width of the low-bed semi-trailer ladder structure is the same as the width of the semi-trailer, and the dead weight is still large. Utility Model Content

[0004] In order to reduce the weight of a single ladder and avoid the ladder occupying the length of the vehicle, the technical solution adopted by the utility model is: a low-bed semi-trailer ladder, including a fixed ladder end obliquely arranged at the rear of the cargo platform, the tail of the fixed ladder end can be flipped and hinged to multiple groups of movable ladder ends, the multiple groups of movable ladder ends can move left and right along the hinge point, and in the folded state, the top surfaces of the multiple groups of movable ladder ends are flush with the top surface of the cargo platform.

[0005] Based on the above, in order to realize a double-hinged connection between the fixed ladder end and the movable ladder end, so as to facilitate flipping and left and right translation movements, a plurality of sets of hinged fixing plates are provided at the tail of the fixed ladder end, a first connecting shaft is provided on the hinged fixing plate, and a second connecting shaft is provided on one side of the movable ladder end, and the first connecting shaft and the second connecting shaft are movably connected through a connecting sleeve assembly.

[0006] Based on the above, the connecting sleeve assembly includes a pair of connecting sleeves arranged in parallel, a connecting plate is arranged between the pair of connecting sleeves, the second connecting shaft movably passes through one of the connecting sleeves, the first connecting shaft passes through the other connecting sleeve, and the length of the second connecting shaft is greater than the length of the connecting sleeve.

[0007] Based on the above, in order to increase friction, facilitate loading and unloading of vehicles, and avoid misalignment of the ladder in the folded state, a number of limit strips are respectively provided on the outer surfaces of the fixed ladder end and the movable ladder end. In the folded state, the limit strip on the fixed ladder end is engaged with the limit strip on the movable ladder end.

[0008] Based on the above, in order to increase the transport function of the low-bed semi-trailer, liftable locks are respectively provided on the cargo platform and the movable ladder end.

[0009] Based on the above, in order to further reduce the weight of a single ladder, a plurality of weight-reducing holes are provided on the end of the movable ladder.

[0010] Based on the above, in order to facilitate maintenance and replacement, the specifications of several movable ladder ends are the same.

[0011] Based on the above, in order to improve driving safety, automobile taillights are arranged on the end surfaces of the two groups of movable ladder ends located on the outer sides.

[0012] The utility model also provides a low-bed semi-trailer compartment, on which the low-bed semi-trailer ladder is installed.

[0013] The utility model has substantial features and progress compared to the prior art. Specifically, the low-bed semi-trailer ladder provided by the utility model can omit the compression spring of the conventional ladder by designing the ladder to be foldable into a structure flush with the semi-trailer cargo platform, thereby reducing the manufacturing cost and effectively increasing the length of the cargo platform to meet the loading of more goods. At the same time, the left and right parts of the conventional ladder are split into four parts, and the single hinge structure is adjusted to a double hinge structure connected by a connecting sleeve assembly and a pair of connecting shafts, so that a single ladder is small in size, light in weight, and convenient for single-person operation.

[0014] Furthermore, by arranging a plurality of limit strips on the inner surface of the ladder, on the one hand, friction can be increased to facilitate loading and unloading of vehicles, and on the other hand, the limit strips can be used to limit the ladder in the folded state, thereby avoiding misalignment of the ladder in the folded state.

[0015] Furthermore, the four ladders in the utility model can be moved left and right, so as to facilitate the climbing of engineering vehicles such as loaders of different sizes and different wheelbases.

[0016] Furthermore, by installing liftable container locks in the semi-trailer cargo platform and ladder, it can meet the shipping needs of containers of different specifications and has a wider range of uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a schematic diagram of the low-bed semi-trailer ladder in an unfolded state.

[0018] Figure 2 The utility model is a schematic diagram of the local structure of the low-bed semi-trailer with the ladder in the unfolded state.

[0019] Figure 3 The utility model is a schematic diagram of the structure of the low-bed semi-trailer ladder in a folded state.

[0020] Figure 4 The utility model is a partial structural schematic diagram of a low-bed semi-trailer ladder in a folded state.

[0021] Figure 5 The utility model is a schematic diagram of the top structure of the low-bed semi-trailer ladder in a folded state.

[0022] Figure 6 The utility model is a schematic diagram of the top partial structure of the low-bed semi-trailer ladder in a folded state.

[0023] In the figure: 1. gooseneck; 2. outrigger; 3. first liftable lock; 4. cargo platform; 5. fixed ladder end; 6. movable ladder end; 7. second liftable lock; 8. connecting sleeve assembly; 9. hinged fixing plate; 10. first connecting shaft; 11. second connecting shaft; 12. limit strip; 13. weight reduction hole. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0025] Example 1

[0026] This embodiment provides a low-bed semi-trailer ladder, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a fixed ladder end 5 obliquely arranged at the rear of the cargo platform 4. The rear of the fixed ladder end 5 can be flipped and hinged with multiple groups of movable ladder ends 6. The multiple groups of movable ladder ends 6 can move left and right along the hinge point. In the folded state, the top surface of the multiple groups of movable ladder ends 6 is flush with the top surface of the cargo platform 4.

[0027] In this embodiment, in order to realize the double hinge connection between the fixed ladder end and the movable ladder end, and to facilitate the flipping and left-right translation, a plurality of sets of hinged fixing plates 9 are provided at the tail of the fixed ladder end 5. A first connecting shaft 10 is provided on the hinged fixing plate 9, and a second connecting shaft 11 is provided on one side of the movable ladder end 6. The first connecting shaft 10 and the second connecting shaft 11 are movably connected through a connecting sleeve assembly 8.

[0028] Specifically, Figure 4 , Figure 5 and Figure 6 As shown, the connecting sleeve assembly 8 includes a pair of connecting sleeves arranged in parallel, and a connecting plate is arranged between the pair of connecting sleeves. The second connecting shaft 11 movably passes through one of the connecting sleeves. The first connecting shaft 10 passes through the other connecting sleeve. The length of the second connecting shaft is greater than the length of the connecting sleeve.

[0029] In order to increase friction, facilitate loading and unloading of vehicles, and avoid misalignment of the ladder in the folded state, the outer surfaces of the fixed ladder end 5 and the movable ladder end 6 are respectively provided with a plurality of limit strips 12. In the folded state, the limit strips on the fixed ladder end are engaged with the limit strips on the movable ladder end.

[0030] In this embodiment, in order to increase the transport function of the low-bed semi-trailer, the cargo platform and the movable ladder end are respectively provided with liftable locks. For the sake of distinction, the liftable lock provided on the cargo platform is recorded as the first liftable lock 3, and the liftable lock provided on the cargo platform is recorded as the second liftable lock 7.

[0031] In order to further reduce the weight of a single ladder, a plurality of weight-reducing holes 13 are provided on the movable ladder end 6 .

[0032] Example 2

[0033] This embodiment provides a low-bed semi-trailer ladder. The main difference from Embodiment 1 is that in this embodiment, in order to facilitate maintenance and replacement, the specifications of several movable ladder ends are the same.

[0034] Example 3

[0035] This embodiment provides a low-bed semi-trailer ladder. The main difference from Embodiment 1 is that in this embodiment, in order to improve driving safety, automobile taillights are provided on the end surfaces of the two groups of movable ladder ends located on the outer sides.

[0036] Example 4

[0037] This embodiment provides a low-bed semi-trailer ladder, and the main difference from Embodiment 1 is that in this embodiment, the length of the first connecting shaft is less than the length of the second connecting shaft.

[0038] Example 5

[0039] This embodiment provides a low-bed semi-trailer compartment, such as Figure 1 and Figure 3 As shown, the low-bed semi-trailer compartment is installed with the low-bed semi-trailer ladder described in any one of Embodiments 1 to 4. The specific structure includes a cargo platform 4, a gooseneck 1 and legs 2 are arranged at the front end of the cargo platform 4, and the low-bed semi-trailer ladder is arranged at the rear end of the cargo platform 4.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A low-bed semi-trailer ladder, characterized by: It comprises a fixed ladder end obliquely arranged at the rear of the cargo platform, wherein the rear of the fixed ladder end can be flipped and hinged to have multiple groups of movable ladder ends, which can move left and right along the hinge point. In the folded state, the top surfaces of the multiple groups of movable ladder ends are flush with the top surface of the cargo platform.

2. The low bed semi-trailer ladder according to claim 1, characterized in that: A plurality of sets of hinged fixing plates are arranged at the tail of the fixed ladder end, a first connecting shaft is arranged on the hinged fixing plate, a second connecting shaft is arranged at one side of the movable ladder end, and the first connecting shaft and the second connecting shaft are movably connected via a connecting sleeve assembly.

3. The low bed semi-trailer ladder according to claim 2, characterized in that: The connecting sleeve assembly includes a pair of connecting sleeves arranged in parallel, a connecting plate is arranged between the pair of connecting sleeves, the second connecting shaft movably passes through one of the connecting sleeves, the first connecting shaft passes through the other connecting sleeve, and the length of the second connecting shaft is greater than the length of the connecting sleeve.

4. The low bed semi-trailer ladder according to claim 1, 2 or 3, characterized in that: The outer surfaces of the fixed ladder end and the movable ladder end are respectively provided with a plurality of limit strips. In the folded state, the limit strips on the fixed ladder end are engaged with the limit strips on the movable ladder end.

5. The low bed semi-trailer ladder according to claim 1, characterized in that: The cargo platform and the movable ladder end are respectively provided with liftable locks.

6. The low bed semi-trailer ladder according to claim 1, 2, 3 or 5, characterized in that: A plurality of weight-reducing holes are provided on the end of the movable ladder.

7. The low bed semi-trailer ladder according to claim 1, 2, 3 or 5, characterized in that: The specifications of several movable ladder ends are the same.

8. The low bed semi-trailer ladder according to claim 7, characterized in that: Automobile taillights are arranged on the end surfaces of the two groups of movable ladder ends located on the outer sides.

9. A low-bed semi-trailer compartment, characterized in that: The low-bed semi-trailer compartment is equipped with a low-bed semi-trailer ladder according to any one of claims 1 to 8.

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