Sliding device for telescopic arm support and telescopic arm support

Abstract

The invention discloses a sliding device for a telescopic arm support. The sliding device comprises two supporting plates, an eccentric shaft, two installation plates, sliding pieces, installation shafts and a baffle plate; an interval is reserved between the two supporting plates, and one supporting plate is provided with a plurality of adjustment holes; the eccentric shaft comprises a main body part and an eccentric part which is protruded on the main body part in a radial direction; two ends of the main body part are arranged on the two supporting plates respectively; an interval is reserved between the two installation plates, and the two installation plates are positioned between the two supporting plates and are sleeved on the eccentric part; the installation shafts are arranged between the two installation plates; two ends of each installation shaft are connected with the two installation plates respectively; the sliding pieces are arranged on the installation shafts; the baffle plate is fixedly connected with the main body part and is near the supporting plate which is provided with the adjustment holes; the baffle plate drives the eccentric shaft to rotate when rotating; and the baffle plate is fixed in one adjustment hole in the supporting plate.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a sliding device used for telescopic booms of boom-type construction machinery such as cranes and concrete pump trucks, and special vehicles such as aerial work vehicles and elevating fire trucks. Background technique [0002] In the current market of construction machinery (such as cranes, concrete pump trucks) and special vehicles (such as aerial work vehicles, elevating fire trucks), a considerable part of the boom systems of products use telescopic booms. The telescopic boom adopts a structure in which multiple boom sections are nested with each other. The inner boom section is set inside the outer boom section, and a telescopic device (such as a telescopic oil cylinder) is used to control the expansion and contraction of the inner boom section relative to the outer boom section to change the entire boom. The length of the rack can transport people or objects to...

AI Technical Summary

Problems solved by technology

[0004] Since the support between the inner boom section and the outer boom section is realized by rollers or sliders, when making the boom, due to various manufacturing errors, it is inevitable that the rollers (or sliders) will produce gaps during support, resulting in If the surface of the supported boom cannot be touched, it is easy to cause the stress concentration of the support and cause damage to the boom

For example, when four rollers (or sliders) are provided along the circumference at the bottom of the inner boom section, if there is a gap between three of the rollers (or sliders) and the outer boom section when they are supported, they cannot touch the outer boom section When the surface of the boom is fixed, the stress of the support will be concentrated on the remaining roller (or slider), and the roller (or slider) will be easily damaged and the boom will also be easily damaged.

In the current technology, there is a defect that the gap cannot be adjusted. When there is a manufacturing error in the boom, it cannot be adjusted so that the roller (or slider) fully contacts the supported boom surface

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