Expandable carriage structure for vehicle

Abstract

The invention provides an expandable carriage structure for a vehicle. The vehicle comprises a chassis and a fixed carriage. The expandable carriage structure comprises a movable carriage, a left movable carriage support guiding mechanism, a right movable carriage support guiding mechanism, a movable carriage transmission mechanism and a power driving mechanism, wherein the movable carriage transmission mechanism comprises a left rack, a right rack, a gear shaft, a left gear and a right gear; the left rack is fixed at the bottom of a left roller carrier of the movable carriage, and the right rack is fixed at the bottom of a right roller carrier of the movable carriage; the middle of the gear shaft is supported on a group of gear shaft bearing blocks which are distributed at intervals; the left end of the gear shaft extends to the left movable carriage support guiding mechanism, and the right end of the gear shaft extends to the right movable carriage support guiding mechanism; the left gear is fixed at the left end of the gear shaft and is meshed with the left rack, and the right gear is fixed at the right end of the gear shaft and is meshed with the right rack; and the power driving mechanism is arranged on the chassis and connected with the gear shaft. The expandable carriage structure has the advantages that the moving stability and reliability of the movable carriage can be guaranteed; the assembly is flexible and convenient; the moving effect is good; the integrity of the bottom plate of the carriage can be guaranteed; and the operation space is increased.

Description

technical field [0001] The invention belongs to the technical field of transportation tools, and in particular relates to a retractable car body structure of a vehicle. Background technique [0002] The vehicles mentioned above mainly refer to van vehicles (also known as vans), which are mainly used for fully sealed transportation of various materials. Materials are protected from rain, excellent protection, good use of space and safety. However, there are known deficiencies in van vehicles, specifically: when relatively large and heavy goods are loaded, the loading efficiency can not meet the requirements of the industry, and the unloading is the same. Rear-opening vans are particularly prominent. Decompose the whole car body into two parts, one is the fixed car body at the front of the vehicle chassis, and the other is the movable car body at the rear of the vehicle chassis (that is, the aforementioned telescopic car body), then the loading and Undoubtedly, the efficien...

AI Technical Summary

Problems solved by technology

This patent can objectively fulfill the technical effects recorded in paragraphs 0015 to 0017 of the description, but there are the following shortcomings: First, as a movable box body (that is, a telescopic box body, the same below), due to its frequent Sliding (moving) on ​​the bottom plate, for example, when loading and unloading goods, the movable box body is displaced toward the front of the car to be in a nested state with the fixed box body, so as to expose the rear of the box floor to facilitate loading and unloading of goods, while during transportation It is also necessary to make the movable box body return to the state of being engaged with the rear part of the fixed box body toward the direction away from the front of the car, that is, toward the rear of the compartment floor, so that the bottoms of the front and rear sides of the movable box body are supported on the front and rear sides of the compartment floor in a movable manner. The supporting effect of the side is an important factor that cannot be neglected when considering whether the structure of the telescopic box body is reasonable or not. However, this patent does not give due enlightenment; The cabin body transmission device referred to in the patent is driven, so whether the structure of the movable box body transmission mechanism set up with the fixed box body as the carrier and the power drive mechanism set up with the vehicle chassis as the carrier is reasonable or not, and the transmission connection between the two The relationship is also an important factor that cannot be neglected when considering the structure of the retractable car body, but the patent also does not give the necessary enlightenment; third, the patent is provided with an equipment movement device on the tail plate, and the equipment movement device (equipment movement Although it is helpful for loading and unloading goods, it will inevitably interfere with the goods after the loading is completed, and the moving device of the equipment will also occupy the space between the fixed box body and the movable box body

In particular, when actually loading and unloading goods, forklifts or similar tools are usually used for goods with relatively large volume and quality, and when loading, because the movable box body is in a state that tends to overlap with the fixed box body, the body of the car floor The rear is exposed so that the equipment movement seems rather cumbersome and adds complexity and manufacturing cost

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