Rotatable telescopic supporting leg assembly and semitrailer carriage

Abstract

The rotatable telescopic supporting leg assembly comprises an upper fixing seat fixed to the bottom of a bottom plate of the carriage, the upper fixing seat is rotatably connected with an upper sleeve assembly through a pin shaft, the lower end of the upper sleeve assembly is in threaded connection with a lead screw, the lower end of the lead screw is in threaded connection with a lower sleeve assembly, and the lower sleeve assembly is in threaded connection with the upper sleeve assembly. The lower end of the lower sleeve assembly is connected with a base assembly; a vertical fixing hole is formed in the lower side of the upper fixing seat, a horizontal fixing hole is formed in the inner side of the upper fixing seat, a limiting hole is formed in the upper sleeve assembly, and a limiting pin is arranged in the limiting hole. The rotatable telescopic supporting leg assembly can meet the requirement for the flatness of a trailer platform surface in the working state of special equipment with low cost.

Description

Technical Field

[0001] The utility model relates to the field of vehicle outriggers, in particular to a rotatable telescopic outrigger assembly and a semitrailer box. Background Art

[0002] At present, medical shelters, emergency power supply and other equipment are transported by semi-trailers or full trailers. When the equipment is in operation, it needs to be parked for a long time, usually at the operation site for a long time. In addition, due to the flatness of the road surface and the long-term changes in the tire pressure of the trailer, the plane of the trailer will be different, affecting the working stability of the equipment. Normal mechanical outriggers and other hydraulic or pneumatic outriggers have complex structures and are expensive.

[0003] For example, the utility model patent with the authorization announcement number CN219236998 U discloses a semi-trailer outrigger structure, including a hydraulic leg, an auxiliary hydraulic device, a force plate, a bottom plate and an anti-wear plate. The hydraulic leg is convenient for overall support, and a telescopic leg is arranged at the output end of the hydraulic leg to cooperate with the extension and retraction of the hydraulic leg. The side wall of the hydraulic leg is provided with an auxiliary hydraulic device, and a telescopic rod 1 is arranged at the output end of the auxiliary hydraulic device, and a telescopic rod 2 is arranged at the output end of the telescopic rod 1. This semi-trailer outrigger structure, through the combined use of accessories, is provided with a hydraulic leg carrying an auxiliary hydraulic device, which can achieve the purpose of adjusting the angle of the force plate when the hydraulic leg cooperates with the telescopic leg to extend and retract, effectively reducing the probability of the force plate shaking, and having a better limiting effect. At the same time, a bottom plate carrying an inner pad is arranged at the bottom of the force plate, which can play a role of buffering and increasing resistance in the process of supporting the leg and the ground, avoiding sliding and severe wear of the contact surface, and is convenient for replacement. However, the semi-trailer outrigger structure is complex and costly. Utility Model Content

[0004] In order to meet the requirements of flatness of the cargo platform of the trailer when special equipment is in operation at a low cost, the technical solution adopted by the utility model is: a rotatable telescopic leg assembly, including an upper fixing seat fixed to the bottom of the bottom plate of the vehicle box, an upper sleeve assembly rotatably connected to the upper fixing seat through a pin shaft, a lead screw is threadedly connected to the lower end of the lead screw, a lower sleeve assembly is threadedly connected to the lower end of the lead screw, and a base assembly is connected to the lower end of the lower sleeve assembly;

[0005] A vertical fixing hole is provided on the lower side of the upper fixing seat, a horizontal fixing hole is provided on the inner side of the upper fixing seat, a limiting hole is provided on the upper sleeve assembly, and a limiting pin is arranged in the limiting hole. In the extended state, the limiting hole corresponds to the vertical fixing hole, and in the retracted state, the limiting hole corresponds to the horizontal fixing hole.

[0006] Based on the above, in order to facilitate processing, the lower end of the upper sleeve assembly is provided with an upper nut that cooperates with the screw thread.

[0007] Based on the above, in order to facilitate installation, a lower nut that cooperates with the screw thread is provided at the top end of the lower sleeve assembly.

[0008] Based on the above, in order to facilitate the adjustment of the length, the lower sleeve assembly is provided with an operating hole for rotating the lower sleeve assembly.

[0009] Based on the above, in order to facilitate maintenance and replacement, the base assembly can be detachably mounted on the lower sleeve assembly.

[0010] Based on the above, in order to avoid interference, the length of the lower sleeve assembly is greater than the length of the lead screw.

[0011] The utility model also provides a semi-trailer box, which is equipped with the rotatable telescopic leg assembly.

[0012] The present invention has substantial features and progress over the prior art. Specifically, the rotatable telescopic leg assembly and semi-trailer box provided by the present invention can ensure that there is no impact on the trailer body structure and related accessories by installing rotatable and retractable mechanical telescopic legs at the vacant positions at the four corners of the trailer. When the equipment is in operation, each leg rotates to a vertical state, and the horizontality of the workbench is adjusted by adjusting the extension length of each leg. When the equipment is in transportation state, each leg rotates to a horizontal state to ensure the passability of the trailer. At the same time, the telescopic leg adopts a fixed seat, an upper sleeve assembly, a lower sleeve assembly and a base assembly design, which can well adjust the horizontality of the workbench to meet the operating requirements and meet the requirements of various working environments. Therefore, the telescopic leg can meet the requirements for the flatness of the trailer cargo table when special equipment is in operation at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram showing a rotatable telescopic leg assembly and a telescopic leg in a semi-trailer box in an unfolded state.

[0014] Figure 2 The utility model is a schematic diagram showing a rotatable telescopic leg assembly and a telescopic leg in a semi-trailer box in a storage state.

[0015] Figure 3 The utility model is a schematic diagram of the overall structure of a rotatable telescopic leg assembly and a telescopic leg assembly in a semi-trailer box.

[0016] In the figure: 1. operating equipment; 2. telescopic outrigger assembly; 3. vehicle box floor; 4. wheel; 5. horizontal fixing hole; 6. upper fixing seat; 7. pin shaft; 8. vertical fixing hole; 9. upper sleeve assembly; 10. upper nut; 11. lower nut; 12. lead screw; 13. lower sleeve assembly; 14. operating hole; 15. base assembly; 16. limit hole; 17. limit pin. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0018] Example 1

[0019] This embodiment provides a rotatable telescopic leg assembly, such as Figure 1 , Figure 2 , Figure 3 As shown, it includes an upper fixing seat 6 fixed to the bottom of the vehicle box bottom plate 3. The upper sleeve assembly 9 is rotatably connected to the upper fixing seat 6 through a pin shaft 7. The lower end of the upper sleeve assembly 9 is threadedly connected to a lead screw 12, the lower end of the lead screw 12 is threadedly connected to a lower sleeve assembly 13, and the lower end of the lower sleeve assembly 13 is connected to a base assembly 15.

[0020] A vertical fixing hole 8 is provided at the lower side of the upper fixing seat 6, a horizontal fixing hole 5 is provided at the inner side of the upper fixing seat 6, and a limiting hole 16 is provided on the upper sleeve assembly 9. A limiting pin 17 is provided in the limiting hole 16. In the extended state, the limiting hole 16 corresponds to the vertical fixing hole 8, and in the retracted state, the limiting hole 16 corresponds to the horizontal fixing hole 5.

[0021] During the specific installation, four rotatable telescopic leg assemblies 2 are installed at the bottom of the vehicle box floor 3, and the operating equipment 1 is placed on the vehicle box floor. By adjusting the height of the four telescopic leg assemblies, the flatness requirement of the trailer cargo platform can be met when special equipment is in operation, and the wheels 4 can be lifted off the ground.

[0022] Example 2

[0023] This embodiment provides a rotatable telescopic leg assembly, which is mainly different from the first embodiment in that, in this embodiment, for the convenience of processing, the lower end of the upper sleeve assembly 9 is provided with an upper nut 10 threadedly matched with the lead screw 12. For the convenience of installation, the top end of the lower sleeve assembly 13 is provided with a lower nut 11 threadedly matched with the lead screw 12. For the convenience of adjusting the length, the lower sleeve assembly 13 is provided with an operating hole 14 for rotating the lower sleeve assembly.

[0024] Example 3

[0025] This embodiment provides a rotatable telescopic leg assembly, which is mainly different from the first embodiment in that, in this embodiment, the base assembly is detachably mounted on the lower sleeve assembly for easy maintenance and replacement. To avoid interference, the length of the lower sleeve assembly is greater than the length of the lead screw.

[0026] Example 4

[0027] This embodiment provides a semi-trailer box, which is equipped with the rotatable telescopic leg assembly described in Example 1, Example 2 or Example 3.

[0028] 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 rotatable telescopic leg assembly, characterized in that: It includes an upper fixing seat fixed to the bottom of the vehicle box bottom plate, the upper sleeve assembly is rotatably connected to the upper fixing seat through a pin shaft, the lower end of the upper sleeve assembly is threadedly connected to a lead screw, the lower end of the lead screw is threadedly connected to a lower sleeve assembly, and the lower end of the lower sleeve assembly is connected to a base assembly; A vertical fixing hole is provided on the lower side of the upper fixing seat, a horizontal fixing hole is provided on the inner side of the upper fixing seat, a limiting hole is provided on the upper sleeve assembly, and a limiting pin is arranged in the limiting hole.

2. The rotatable telescopic leg assembly according to claim 1, characterized in that: An upper nut matched with the thread of the lead screw is arranged at the lower end of the upper sleeve assembly.

3. The rotatable telescopic leg assembly according to claim 2, characterized in that: A lower nut matched with the thread of the lead screw is arranged at the top end of the lower sleeve assembly.

4. The rotatable telescopic leg assembly according to claim 3, characterized in that: The lower sleeve assembly is provided with an operating hole for rotating the lower sleeve assembly.

5. The rotatable telescopic leg assembly according to claim 4, characterized in that: The base assembly is detachably mounted on the lower sleeve assembly.

6. The rotatable telescopic leg assembly according to claim 5, characterized in that: The length of the lower sleeve assembly is greater than the length of the lead screw.

7. A semi-trailer box, characterized in that: The semi-trailer box is equipped with a rotatable telescopic leg assembly as described in any one of claims 1 to 6.

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