Multi-stage suspension oil cylinder for amphibious vehicle

Abstract

The invention provides a multi-stage suspension oil cylinder for an amphibious vehicle. The multi-stage suspension oil cylinder for the amphibious vehicle comprises a cylinder barrel and multiple stages of piston rods telescopically sleeved in the cylinder barrel, the end, extending into the cylinder barrel, of a piston rod of the smallest stage in the cylinder barrel is a first piston, and a rod head is arranged at the end, extending out of the cylinder barrel, of the other end of the piston rod of the smallest stage in the cylinder barrel. The rod head is provided with a rod cavity oil port and a rodless cavity oil port; a rodless cavity is formed between the first piston and the cylinder barrel; rod cavities are formed among the multiple stages of piston rods; and a built-in oil pipe is arranged in the piston rod of the smallest stage, one end of the built-in oil pipe is communicated with the rodless cavity oil port, and the other end of the built-in oil pipe penetrates through the first piston to be communicated with the rodless cavity. A communicated oil port is arranged between every two stages of piston rods, and the rod cavity oil port is communicated with each rod cavity through the oil port. Compared with the prior art, the multi-stage suspension oil cylinder for the amphibious vehicle is simple in structure, light in weight and higher in reliability.

Description

technical field [0001] The invention relates to the technical field of vehicle engineering, in particular to a multi-stage suspension oil cylinder for amphibious vehicles, which is applied to wheel-track composite drive amphibious vehicles. Background technique [0002] Wheel-track composite drive Amphibious vehicles rely on tires to drive at high speeds. The water jet propulsion provides power for driving on water. When leaving the water and entering the beach, the wheel-track compound is used to drive, which can reduce the specific pressure on the ground, prevent the vehicle from sinking, and maintain driving capabilities. , is a new type of high mobility equipment. The track of the wheel-track compound drive amphibious vehicle is connected with the vehicle body through an oil-pneumatic suspension cylinder. [0003] Hydro-pneumatic suspension is a type of suspension that uses hydro-pneumatic springs. The oil and gas spring is mainly composed of suspension cylinder, accum...

AI Technical Summary

Problems solved by technology

[0004] Existing patents such as the equal-thrust hydraulic multi-stage suspension oil cylinder publicized by the notification number CN211259204U, the oil port of the external oil pipe is arranged on the cylinder barrel, so that the piston rod is placed down, and it is easy to bump the piston rod when the amphibious vehicle is driving. Outer round surface, causing seal and cylinder damage

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