Engineering machinery and changeable track base plate device thereof

Abstract

The invention discloses a changeable track base plate device of engineering machinery. The changeable track base plate device comprises a stander, traveling devices arranged on two sides of the stander and telescopic supporting legs, wherein one end of each telescopic leg is connected to the stander, and the other end of each telescopic leg is connected to each traveling device; when the telescopic supporting legs stretch, the traveling devices get close to or get away from the stander, so that the engineering machinery can change the track. The telescopic supporting legs can drive the relatively heavy traveling devices, have a relatively large adjustment range and are suitable for the large-tonnage engineering machinery with a relatively large working area; the telescopic supporting legs and the traveling devices are directly connected; when a working state and a transportation state are converted, only the stretching lengths of the telescopic supporting legs are adjusted; compared with the complexity of the alternating operation that a frame returns to the stander and extends out of the outer side of the stander, the operation complexity of the changeable track base plate device is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an engineering machinery and a variable rail chassis device thereof. Background technique [0002] Large-scale construction machinery, such as cranes and excavators, often work with heavy loads. Therefore, their own volume is also relatively large. In order to ensure work stability and convenient transportation, they are generally equipped with a chassis device with variable rails, or a rail-fixed chassis. A bracket is arranged on the top, which is used to adjust the lateral spacing of the traveling devices on both sides of the traveling direction, so as to realize the track change. [0003] In this paper, the direction of travel of construction machinery is defined as the longitudinal direction, and the direction perpendicular to the longitudinal direction in the horizontal plane is defined as the transverse direction. [0004] Please refer to figure 1 and figu...

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Problems solved by technology

[0010] In fact, in the prior art, it is impossible to achieve track change for large-tonnage construction machinery, and it is necessary to set up a separate support 202 for auxiliary operations. Every time the alternate operation between the transport state and the working state, the support 202 must be rotated to extend and recover, and the support 202 It is a large-scale integrated component, and the operation is complicated. Moreover, the bracket 202 is in a vertical state after being retracted, and

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