Engineering machinery and telescopic distributing arm support thereof

Abstract

The invention discloses a telescopic distributing arm support, which is used for engineering machinery and comprises an arm support body and conveying pipes arranged on the arm support body. The arm support body comprises at least two telescopic arms; the conveying tubes comprise a plurality of pipes which are successively hinged, the first pipe (21) is connected with the first telescopic arm (11) of the arm support body, and the last pipe (22) is connected with the last telescopic arm (12) of the arm support body; the first pipe (21) is hinged with the first telescopic arm (11); and when the conveying pipes are gathered, the various hinged points are arrayed along the length direction of the arm support body sequentially. In the telescopic distributing arm support with the structural design, the largest height of the conveying pipes in gathering and scattering processes can be remarkably reduced, and according smooth construction operation can be guaranteed. In addition, the invention further discloses the engineering machinery comprising the telescopic distribution arm support.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a telescopic cloth boom. In addition, the present invention also relates to a construction machine including the telescopic cloth boom. Background technique [0002] Existing concrete pump trucks generally use multi-section M-type (low deployment height, fast speed), R-type (compact structure) or RZ-type boom (combining the advantages of both M-type and R-type, suitable for long-arm pumps) car). In the field of short-boom pump trucks, there are more stringent requirements for the height and flexibility of the boom of the pump truck, so as to expand the operating function and improve the scope of application of the equipment. For example, use short-boom pump trucks inside buildings or tunnels construction. In order to meet the above requirements, the telescopic boom has been more and more widely used. [0003] The Chinese patent "published by the State Intellectu...

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Problems solved by technology

[0006] Please refer to figure 1 and image 3 , the head pipe 2′1 is fixed relative to the first telescopic arm 1′1, when the middle pipe 2′2 is folded or unfolded, the middle pipe 2′2 needs to rotate around the first hinge point 4′1, and the second hinge point Both 4'2 and the third hinge point 4'3 cross the first hinge point 4'1, and in the process, the upper part of the middle pipe 2'2 will exceed the top surface of the first telescopic arm 1'1, that is, the middle part The pipe 2'2 will exceed the top surface of the first section of the telescopic boom 1'1, which is a great challenge for working in low-height working spaces such as tunnels, because the middle pipe 2'2 is extremely difficult during the rotation process. May touch the roof wall of the tunnel, preventing construction work from being completed

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