Telescopic device for screed

The invention discloses a telescopic device for a screed. The telescopic device adopts a main supporting pipe being matched with a guide pipe as a supporting structure, and is installed on an inner side plate and an outer side plate of a foundation frame; a telescopic suspension inner side plate, a telescopic suspension outer side plate, a front cross beam and a rear cross beam form a main body frame of the telescopic device, the main body frame is connected with the main supporting pipe and the guide pipe in a matched mode through three points, and a space three-dimensional bending and torsion resistant structure is formed. The main supporting pipe and the guide pipe of the telescopic device are both of single steel pipe structures, processing is easy, the cost is low, the two pipes are mounted on the side plates of the foundation frame without an additional supporting structure, and the frame structure is simplified. 本发明公开一种熨平板用伸缩装置，所述伸缩装置采用主支撑管配合导向管作为支撑结构，安装于基础框架的内、外侧板上；伸缩悬挂内、外侧板加上前、后横梁构成伸缩装置的主体框架，主体框架与主支撑