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Design method for hinge points of pullshovel working device of monobucket hydraulic excavator

A technology of hydraulic excavators and working devices, which is applied to mechanically driven excavators/dredgers, etc., and can solve problems such as not considering the influence of natural frequencies

Inactive Publication Date: 2015-06-10
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of these methods is that the hinge point of the backhoe working device is only designed from the static state, and the influence of the hinge point of the backhoe working device on the natural frequency of the working device is not considered

Method used

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  • Design method for hinge points of pullshovel working device of monobucket hydraulic excavator
  • Design method for hinge points of pullshovel working device of monobucket hydraulic excavator
  • Design method for hinge points of pullshovel working device of monobucket hydraulic excavator

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Embodiment

[0145] Step 1. Selection of the size and pose of the working device of the original excavator:

[0146] Taking a 30-ton excavator as the original excavator, select the maximum excavation depth of the excavator as the optimal design pose as follows: figure 2 shown.

[0147] Step 2. Establish an institutional model:

[0148] At the moment of excavation by the hydraulic excavator, the bucket and the ground are regarded as a fixed connection, and the fuselage is regarded as a fixed connection, then the three main components of the boom, arm and boom cylinder can be established image 3 Institutional model in;

[0149] Step 3: When the boom cylinder is fully retracted, it is equivalent to a rod of equal diameter:

[0150] In the software ANSYS, fix one end of the assembly when the boom cylinder is fully retracted, and apply an axial force F to the other end 1 and radial force F 2 ,F 1 is the maximum thrust of the oil cylinder, F 2 The linear distributed force is 1.6N / mm, an...

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Abstract

The invention provides a design method for hinge points of a pullshovel working device of a monobucket hydraulic excavator and belongs to the technical field of monobucket hydraulic excavators. The design method for a hinge point (B) of a movable arm oil cylinder and a movable arm and a hinge point (F) of the movable arm and a bucket rod is characterized by comprising the following steps of: 1, selecting the size and the pose of the working device of an original excavator; 2, establishing a mechanism model; 3, enabling the movable arm oil cylinder to be equivalent to an equal-diameter rod during full shrinkage; 4, establishing a mechanism elastokinetics model; 5, establishing a system quality matrix and a stiffness matrix; 6, establishing constraints; 7, performing optimum design on the hinge point B; and 8, performing optimum design on the hinge point F. According to the method provided by the invention, the hinge points are designed through calculating the maximal hinge point position at natural frequency of the pullshovel working device by utilizing a particle swarm optimization intelligent algorithm, so that the method provided by the invention has the advantages of short design period, high programming degree, systematically improved dynamic characteristic of the pullshovel working device, and the like.

Description

technical field [0001] The invention belongs to the technical field of single-bucket hydraulic excavators, and in particular relates to a design method for a hinge point of a backhoe working device of a single-bucket hydraulic excavator. Background technique [0002] Single-bucket hydraulic excavator is a kind of multi-functional engineering machinery, which is widely used in mechanical construction such as water conservancy projects, transportation, electric power engineering and mining excavation. It can reduce heavy physical labor, ensure project quality, speed up construction and It plays a very important role in improving labor productivity. [0003] Single-bucket hydraulic excavators have harsh working conditions, many shocks and vibrations, and they are subjected to complex dynamic loads during the operation; a sudden increase in heavy loads will have a huge impact on the machine, which will cause great damage to the structural parts of the machine. Lead to material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02F3/38
Inventor 李海虹李建成张学良陈志恢
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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