Built-in oil pipe type oil cylinder module for transport vehicle wheel train, wheel train unit and transport vehicle

Abstract

The invention discloses a built-in oil pipe type oil cylinder module for a transport vehicle wheel train, a wheel train unit and a transport vehicle. The built-in oil pipe type oil cylinder module for the transport vehicle wheel train comprises a piston rod, a cylinder barrel and an outer cylinder sleeve; the piston rod is nested in the cylinder barrel; an oil pipe 1 and an oil pipe 2 are arranged in the piston rod; the oil pipe 1 communicates with a rodless cavity in the cylinder barrel; the oil pipe 2 communicates with a rod cavity in the cylinder barrel; the piston rod and the cylinder barrel do not rotate relatively; the cylinder barrel is sleeved with the outer cylinder sleeve; and the outer cylinder sleeve and the cylinder barrel freely rotate relative to each other. The built-in oil pipes are adopted; when the piston rod ascends and descends, the two oil pipes do not displace relative to the piston rod, so that the situation that an external oil pipe is continuously bent when the piston rod ascends and descends is avoided; and when the outer cylinder sleeve rotates relative to the cylinder barrel, the built-in oil pipes do not rotate relative to the cylinder barrel, so that the situation that the external oil pipe is continuously wound and twisted during steering is avoided, the service life of the oil pipes is prolonged, reliability is good; and the application range is wide.

Description

technical field [0001] The invention relates to the field of a wheel train of a transport vehicle, in particular to a built-in oil pipe type oil cylinder module for a transport wheel train, a wheel train unit including the module, and a transport vehicle. Background technique [0002] In the existing conventional vehicle wheel train unit, the hydraulic cylinder module with external oil pipes is usually used to control the vertical movement of the frame relative to the wheels, that is, the path of the hydraulic oil pipe from the car body to the wheel train will pass through the drag chain structure, or It does not go through the drag chain but runs parallel to the drag chain, and the hydraulic oil pipe is arranged outside the hydraulic cylinder. In this way, during the steering and lifting movement of the wheel train, the hydraulic oil pipe will repeatedly bend and twist, the hydraulic oil pipe is easily damaged, and the service life and reliability are reduced; and the exter...

AI Technical Summary

Problems solved by technology

In this way, during the steering and lifting movement of the wheel train, the hydraulic oil pipe will repeatedly bend and twist, the hydraulic oil pipe is easily damaged, and the service life and reliability are reduced; and the external hydraulic oil pipe will take up space, making the structure redundant and not compact, and the volume is relatively small. Huge, narrow scope

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