Horizontal expansion device for bridge detection operating vehicle

Abstract

The invention discloses a horizontal expansion device for a bridge detection operating vehicle. The horizontal expansion device comprises a boom assembly which is of a truss type structure and a chain transmission device arranged at the lower part of the boom assembly, wherein the boom assembly comprises basic arms and expansion arms; the chain transmission device comprises symmetrically arranged transmission chains, a chain wheel box, guide chain wheels I symmetrically arranged on the chain wheel box, symmetrically arranged guide chain wheels II and driving chain wheels; the transmission chains are respectively meshed with the three types of chain wheels in a v-shaped manner; two ends of the transmission chains are respectively fixed at the lower parts of the expansion arms of left and right tensioning devices; the two driving chain wheels are mounted on one transmission shaft and driven by one hydraulic motor; and the chain transmission device is symmetrically arranged at the front and rear positions of the boom assembly, the driving chain wheels are mounted on the same transmission shaft, and the transmission shaft is connected with an output shaft of the hydraulic motor, so that the phenomenon of unsmooth expansion motion and even the risk of breakage of the chains due to mutual inclination of central axial lines of the expansion arms and the basic arms can be avoided.

Description

technical field [0001] The invention relates to a telescopic device, in particular to a horizontal telescopic device for a bridge detection operation vehicle suitable for a bridge operation platform. Background technique [0002] The horizontal telescopic device is an operation platform on the bridge inspection vehicle for personnel to carry out inspection, maintenance and reinforcement, mainly including telescopic arm, basic arm and telescopic drive device. At present, the telescopic movement of the telescopic arm of the bridge inspection vehicle relative to the basic arm is driven by gear-rack transmission or friction wheel transmission. This mainly has the following problems: First, there is a certain gap between the telescopic arm and the basic arm, and its relative position will change due to various factors, making the meshing condition of the gear and the rack unsatisfactory, resulting in a gap between the telescopic arm and the basic arm. It will produce large vibra...

AI Technical Summary

Problems solved by technology

This mainly has the following problems: First, there is a certain gap between the telescopic arm and the basic arm, and its relative position will change due to various factors, making the meshing condition of the gear and the rack unsatisfactory, resulting in a gap between the telescopic arm and the basic arm. It will produce large vibration and noise; the second is that the friction wheel transmission is affected by factors such as environment, wear, load size, lubrication, etc., and it is prone to insufficient friction driving force, which leads to unreliable telescopic action; third, the structure is relatively complex and installation The difficulty is relatively high and the cost is high; the fourth is that the self-locking performance of the friction wheel transmission is poor, and it is easy to cause the telescopic arm to slip by itself under the action of external force, which will adversely affect the detection operation

In order to overcome the above-mentioned defects, the Chinese invention patent No. is 201110033073.7, the authorized announcement number is CN102127897B, and the name is called "a horizontal expansion device for a bridge inspection vehicle" which discloses a technology that can effectively overcome the above-mentioned defects. A chain drives the telescopic action between the basic arm and the telescopic arm. Since the front and rear width of the boom assembly of the truss structure is generally wider, and there is generally a large gap between the basic arm and the telescopic arm, the telescopic arm and the telescopic arm generally have a large gap. The central axes between the basic arms will be inclined relative to each other, which will not only make the telescopic movement difficult, but may even cause the chain to break

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