Test method for working resistance of loader test bench and front-end working part of loader

Abstract

The invention discloses a loading machine experiment table and method for testing the operation resistance of a front-end working part of a loading machine. The method employs an experiment table fortesting, wherein the experiment table comprises a trolley, a rail, and a drive device. The method comprises the following steps: installing a front-end working device on a fixed plate; installing thefixed plate on a quick connection plate through a three-dimensional force sensor; inserting the quick connection plate into an installation plate, thereby enabling the front-end working device and thetrolley to be assembled in one body; controlling a bucket to reach a set height and an insertion angle; driving the trolley to obtain the set speed to move to an experiment material pile; setting thedepth of insertion into materials; enabling the bucket to be inserted into the experiment material pile; measuring the resistance data in three directions X, Y and Z through the three-dimensional force sensor when the bucket is inserted into the experiment material pile, and calculating the working resistance of the front-end working part through the resistance data in three directions X, Y and Z. The method can enable an experiment to be carried out repeatedly in an initial state, and achieves the performance testing or measurement of the selected front-end working part.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a loader test bench and a method for testing the working resistance of a front-end working part. Background technique [0002] Wheel loader is a kind of construction machinery with a very wide range of uses, which can complete operations such as shovel loading, unloading, handling, and leveling of bulk materials. Using different working devices, the wheel loader can complete different tasks such as bulldozing, lifting and loading and unloading wood. The traditional design methods of wheel loader working devices include analog trial and error drawing method and translation-based drawing method, but these methods are difficult to meet the design requirements, the development cycle is long, and the work is too cumbersome. Today's design is more used The design and analysis of the working device of the wheel loader is carried out by virtual prototyping technology. The...

AI Technical Summary

Problems solved by technology

[0003] At present, the test system of loaders at home and abroad basically adopts the whole machine test for the operation resistance test, which cannot accurately control the working parameters and environmental conditions. The experimental data is completely based on the experience of the experimenters on the whole machine.

[0004] Moreover, the existing test method is based on the whole machine, and the pin sensor is installed at the connecting joint between the bucket and the linkage mechanism. The disadvantage is that the pin sensor connecting the Z connecting rod and the bucket will affect the movement of the boom. The pin sensor at the connection with the bucket measures the Z axial torque and X, Z axial force, which reduces the measurement accuracy

[0005] Existing test systems all use customized 2D or 3D pin sensors, which are very costly and have low accuracy +-3%

[0006] There are too many interference factors in the whole machine test. For example, the whole machine test method can only measure the force of the bucket, and the three-dimensional force sensor at the lower end is affected by the pin sensor at the upper end. The test is not accurate enough, and the test results are also affected by the loading machine. The impact of wheel vibration; at the same time, the insertion speed control accuracy is low, which directly leads to inaccurate measurement results; and this method does not have the function of replacing the bucket and boom, and the test system has poor versatility; the sensor used is a special two-dimensional or three-dimensional pin Force sensor, high cost; the installation of the sensor adopts interference fit, which is difficult to assemble and maintain; the connection stiffness of the sensor is limited, easy to damage, and low reliability; human operation has a great impact on the accuracy of the repeatable test results

These are not good for the test results

[0007] For the whole machine test, each test must be suspended or replaced according to the physical exertion of the test personnel. It is impossible to continue the test for a long time, and the research cycle takes a long time

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